21153022251102 has 24 divisors (see below), whose sum is σ = 52378912241136. Its totient is φ = 6043720643136.

The previous prime is 21153022251089. The next prime is 21153022251103. The reversal of 21153022251102 is 20115222035112.

21153022251102 is a `hidden beast` number, since 2 + 1 + 1 + 5 + 302 + 2 + 251 + 102 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21153022251103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83940564363 + ... + 83940564614.

It is an arithmetic number, because the mean of its divisors is an integer number (2182454676714).

Almost surely, 2^{21153022251102} is an apocalyptic number.

21153022251102 is an abundant number, since it is smaller than the sum of its proper divisors (31225889990034).

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

21153022251102 is a wasteful number, since it uses less digits than its factorization.

21153022251102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167881128992 (or 167881128989 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 21153022251102 its reverse (20115222035112), we get a palindrome (41268244286214).

The spelling of 21153022251102 in words is "twenty-one trillion, one hundred fifty-three billion, twenty-two million, two hundred fifty-one thousand, one hundred two".