21002130112026 has 64 divisors (see below), whose sum is σ = 50537591377920. Its totient is φ = 5684095166400.

The previous prime is 21002130112013. The next prime is 21002130112027. The reversal of 21002130112026 is 62021103120012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21002130111993 and 21002130112011.

It is not an unprimeable number, because it can be changed into a prime (21002130112027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4975551 + ... + 8170701.

It is an arithmetic number, because the mean of its divisors is an integer number (789649865280).

Almost surely, 2^{21002130112026} is an apocalyptic number.

21002130112026 is an abundant number, since it is smaller than the sum of its proper divisors (29535461265894).

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

21002130112026 is a wasteful number, since it uses less digits than its factorization.

21002130112026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203419.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21002130112026 its reverse (62021103120012), we get a palindrome (83023233232038).

The spelling of 21002130112026 in words is "twenty-one trillion, two billion, one hundred thirty million, one hundred twelve thousand, twenty-six".