202121420311434 has 64 divisors (see below), whose sum is σ = 435707352823680. Its totient is φ = 62138510257920.

The previous prime is 202121420311427. The next prime is 202121420311507. The reversal of 202121420311434 is 434113024121202.

It is a happy number.

It is a super-2 number, since 2×202121420311434² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2376151264 + ... + 2376236324.

It is an arithmetic number, because the mean of its divisors is an integer number (6807927387870).

Almost surely, 2^{202121420311434} is an apocalyptic number.

202121420311434 is an abundant number, since it is smaller than the sum of its proper divisors (233585932512246).

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

202121420311434 is a wasteful number, since it uses less digits than its factorization.

202121420311434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110535.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 202121420311434 its reverse (434113024121202), we get a palindrome (636234444432636).

The spelling of 202121420311434 in words is "two hundred two trillion, one hundred twenty-one billion, four hundred twenty million, three hundred eleven thousand, four hundred thirty-four".