202121402 has 32 divisors (see below), whose sum is σ = 352041984. Its totient is φ = 85248000.

The previous prime is 202121399. The next prime is 202121407. The reversal of 202121402 is 204121202.

It is a super-2 number, since 2×202121402² = 81706122292891208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (202121407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315002 + ... + 315642.

It is an arithmetic number, because the mean of its divisors is an integer number (11001312).

Almost surely, 2^202121402 is an apocalyptic number.

202121402 is a deficient number, since it is larger than the sum of its proper divisors (149920582).

202121402 is a wasteful number, since it uses less digits than its factorization.

202121402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 202121402 is about 14216.9406694971. The cubic root of 202121402 is about 586.8639521723.

Adding to 202121402 its reverse (204121202), we get a palindrome (406242604).

The spelling of 202121402 in words is "two hundred two million, one hundred twenty-one thousand, four hundred two".