202121010 has 384 divisors, whose sum is σ = 717050880. Its totient is φ = 38320128.

The previous prime is 202120979. The next prime is 202121053. The reversal of 202121010 is 10121202.

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 = 202120983 and 202121001.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5462712 + ... + 5462748.

It is an arithmetic number, because the mean of its divisors is an integer number (1867320).

Almost surely, 2^202121010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202121010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358525440).

202121010 is an abundant number, since it is smaller than the sum of its proper divisors (514929870).

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

202121010 is a wasteful number, since it uses less digits than its factorization.

202121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 202121010 is about 14216.9268831207. The cubic root of 202121010 is about 586.8635727785.

Adding to 202121010 its reverse (10121202), we get a palindrome (212242212).

The spelling of 202121010 in words is "two hundred two million, one hundred twenty-one thousand, ten".