21131030101224 has 32 divisors (see below), whose sum is σ = 52843359013920. Its totient is φ = 7041572198976.

The previous prime is 21131030101219. The next prime is 21131030101229. The reversal of 21131030101224 is 42210103013112.

It is an interprime number because it is at equal distance from previous prime (21131030101219) and next prime (21131030101229).

It is a self number, because there is not a number n which added to its sum of digits gives 21131030101224.

It is not an unprimeable number, because it can be changed into a prime (21131030101229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131449339 + ... + 131609994.

It is an arithmetic number, because the mean of its divisors is an integer number (1651354969185).

Almost surely, 2^{21131030101224} is an apocalyptic number.

21131030101224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21131030101224 is an abundant number, since it is smaller than the sum of its proper divisors (31712328912696).

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

21131030101224 is a wasteful number, since it uses less digits than its factorization.

21131030101224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263062689 (or 263062685 counting only the distinct ones).

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

Adding to 21131030101224 its reverse (42210103013112), we get a palindrome (63341133114336).

The spelling of 21131030101224 in words is "twenty-one trillion, one hundred thirty-one billion, thirty million, one hundred one thousand, two hundred twenty-four".