21112122122052 has 24 divisors (see below), whose sum is σ = 53050973537856. Its totient is φ = 6496037575968.

The previous prime is 21112122122051. The next prime is 21112122122131. The reversal of 21112122122052 is 25022122121112.

It is not an unprimeable number, because it can be changed into a prime (21112122122051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67667057928 + ... + 67667058239.

It is an arithmetic number, because the mean of its divisors is an integer number (2210457230744).

Almost surely, 2^{21112122122052} is an apocalyptic number.

It is an amenable number.

21112122122052 is an abundant number, since it is smaller than the sum of its proper divisors (31938851415804).

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

21112122122052 is a wasteful number, since it uses less digits than its factorization.

21112122122052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135334116187 (or 135334116185 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 21112122122052 its reverse (25022122121112), we get a palindrome (46134244243164).

The spelling of 21112122122052 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, fifty-two".