1021211010 has 64 divisors (see below), whose sum is σ = 2749743360. Its totient is φ = 269671680.

The previous prime is 1021211003. The next prime is 1021211011. The reversal of 1021211010 is 101121201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021210983 and 1021211001.

It is not an unprimeable number, because it can be changed into a prime (1021211011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9450 + ... + 46170.

It is an arithmetic number, because the mean of its divisors is an integer number (42964740).

Almost surely, 2^1021211010 is an apocalyptic number.

1021211010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021211010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1374871680).

1021211010 is an abundant number, since it is smaller than the sum of its proper divisors (1728532350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021211010 is a wasteful number, since it uses less digits than its factorization.

1021211010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36840 (or 36834 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1021211010 is about 31956.3923182827. The cubic root of 1021211010 is about 1007.0209278766.

Adding to 1021211010 its reverse (101121201), we get a palindrome (1122332211).

The spelling of 1021211010 in words is "one billion, twenty-one million, two hundred eleven thousand, ten".