21121302202112 has 36 divisors (see below), whose sum is σ = 48182970652656. Its totient is φ = 9051986657280.

The previous prime is 21121302202111. The next prime is 21121302202123. The reversal of 21121302202112 is 21120220312112.

It is a super-2 number, since 2×21121302202112² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121302202111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5893218689 + ... + 5893222272.

Almost surely, 2^{21121302202112} is an apocalyptic number.

It is an amenable number.

21121302202112 is an abundant number, since it is smaller than the sum of its proper divisors (27061668450544).

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

21121302202112 is an equidigital number, since it uses as much as digits as its factorization.

21121302202112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11786440984 (or 11786440970 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21121302202112 its reverse (21120220312112), we get a palindrome (42241522514224).

The spelling of 21121302202112 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred two million, two hundred two thousand, one hundred twelve".