21124121100402 has 16 divisors (see below), whose sum is σ = 42367925610720. Its totient is φ = 7021426465152.

The previous prime is 21124121100367. The next prime is 21124121100431. The reversal of 21124121100402 is 20400112142112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4986806452 + ... + 4986810687.

It is an arithmetic number, because the mean of its divisors is an integer number (2647995350670).

Almost surely, 2^{21124121100402} is an apocalyptic number.

21124121100402 is an abundant number, since it is smaller than the sum of its proper divisors (21243804510318).

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

21124121100402 is a wasteful number, since it uses less digits than its factorization.

21124121100402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9973617497.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21124121100402 its reverse (20400112142112), we get a palindrome (41524233242514).

The spelling of 21124121100402 in words is "twenty-one trillion, one hundred twenty-four billion, one hundred twenty-one million, one hundred thousand, four hundred two".