10210110021 has 80 divisors (see below), whose sum is σ = 16250319360. Its totient is φ = 6375283200.

The previous prime is 10210109999. The next prime is 10210110037. The reversal of 10210110021 is 12001101201.

It is a happy number.

It is not a de Polignac number, because 10210110021 - 2⁵ = 10210109989 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 10210109985 and 10210110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10210110041) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 25461421 + ... + 25461821.

It is an arithmetic number, because the mean of its divisors is an integer number (203128992).

Almost surely, 2^10210110021 is an apocalyptic number.

It is an amenable number.

10210110021 is a deficient number, since it is larger than the sum of its proper divisors (6040209339).

10210110021 is a wasteful number, since it uses less digits than its factorization.

10210110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 679 counting only the distinct ones).

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

Adding to 10210110021 its reverse (12001101201), we get a palindrome (22211211222).

The spelling of 10210110021 in words is "ten billion, two hundred ten million, one hundred ten thousand, twenty-one".