21253235201202 has 16 divisors (see below), whose sum is σ = 43105153084992. Its totient is φ = 6984631286640.

The previous prime is 21253235201183. The next prime is 21253235201251. The reversal of 21253235201202 is 20210253235212.

It is a happy number.

It is a super-2 number, since 2×21253235201202² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21253235201202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24945111313 + ... + 24945112164.

It is an arithmetic number, because the mean of its divisors is an integer number (2694072067812).

Almost surely, 2^{21253235201202} is an apocalyptic number.

21253235201202 is an abundant number, since it is smaller than the sum of its proper divisors (21851917883790).

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

21253235201202 is a wasteful number, since it uses less digits than its factorization.

21253235201202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49890223553.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21253235201202 its reverse (20210253235212), we get a palindrome (41463488436414).

The spelling of 21253235201202 in words is "twenty-one trillion, two hundred fifty-three billion, two hundred thirty-five million, two hundred one thousand, two hundred two".