21023130112984 has 8 divisors (see below), whose sum is σ = 39418368961860. Its totient is φ = 10511565056488.

The previous prime is 21023130112979. The next prime is 21023130112991. The reversal of 21023130112984 is 48921103132012.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1313945632054 + ... + 1313945632069.

Almost surely, 2^{21023130112984} is an apocalyptic number.

It is an amenable number.

21023130112984 is a deficient number, since it is larger than the sum of its proper divisors (18395238848876).

21023130112984 is a wasteful number, since it uses less digits than its factorization.

21023130112984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2627891264129 (or 2627891264125 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

Adding to 21023130112984 its reverse (48921103132012), we get a palindrome (69944233244996).

The spelling of 21023130112984 in words is "twenty-one trillion, twenty-three billion, one hundred thirty million, one hundred twelve thousand, nine hundred eighty-four".