21352525201212 has 48 divisors (see below), whose sum is σ = 50129802586752. Its totient is φ = 7073619192000.

The previous prime is 21352525201193. The next prime is 21352525201223. The reversal of 21352525201212 is 21210252525312.

It is a super-2 number, since 2×21352525201212² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68796118 + ... + 69105794.

It is an arithmetic number, because the mean of its divisors is an integer number (1044370887224).

Almost surely, 2^{21352525201212} is an apocalyptic number.

It is an amenable number.

21352525201212 is an abundant number, since it is smaller than the sum of its proper divisors (28777277385540).

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

21352525201212 is a wasteful number, since it uses less digits than its factorization.

21352525201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345098 (or 345096 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 21352525201212 its reverse (21210252525312), we get a palindrome (42562777726524).

The spelling of 21352525201212 in words is "twenty-one trillion, three hundred fifty-two billion, five hundred twenty-five million, two hundred one thousand, two hundred twelve".