21020311442130 has 256 divisors, whose sum is σ = 68663270301696. Its totient is φ = 3976636446720.

The previous prime is 21020311442113. The next prime is 21020311442153. The reversal of 21020311442130 is 3124411302012.

It is a self number, because there is not a number n which added to its sum of digits gives 21020311442130.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2602174 + ... + 6986553.

It is an arithmetic number, because the mean of its divisors is an integer number (268215899616).

Almost surely, 2^{21020311442130} is an apocalyptic number.

21020311442130 is an abundant number, since it is smaller than the sum of its proper divisors (47642958859566).

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

21020311442130 is a wasteful number, since it uses less digits than its factorization.

21020311442130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9588841.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21020311442130 its reverse (3124411302012), we get a palindrome (24144722744142).

The spelling of 21020311442130 in words is "twenty-one trillion, twenty billion, three hundred eleven million, four hundred forty-two thousand, one hundred thirty".