21153012611142 has 32 divisors (see below), whose sum is σ = 44710079137920. Its totient is φ = 6653285568000.

The previous prime is 21153012611117. The next prime is 21153012611149. The reversal of 21153012611142 is 24111621035112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21153012611149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369598363 + ... + 369655590.

It is an arithmetic number, because the mean of its divisors is an integer number (1397189973060).

Almost surely, 2^{21153012611142} is an apocalyptic number.

21153012611142 is an abundant number, since it is smaller than the sum of its proper divisors (23557066526778).

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

21153012611142 is a wasteful number, since it uses less digits than its factorization.

21153012611142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739254228.

The product of its (nonzero) digits is 2880, while the sum is 30.

Adding to 21153012611142 its reverse (24111621035112), we get a palindrome (45264633646254).

The spelling of 21153012611142 in words is "twenty-one trillion, one hundred fifty-three billion, twelve million, six hundred eleven thousand, one hundred forty-two".