21123020244210 has 32 divisors (see below), whose sum is σ = 53363419565760. Its totient is φ = 5336341956288.

The previous prime is 21123020244101. The next prime is 21123020244281. The reversal of 21123020244210 is 1244202032112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18528964557 + ... + 18528965696.

It is an arithmetic number, because the mean of its divisors is an integer number (1667606861430).

Almost surely, 2^{21123020244210} is an apocalyptic number.

21123020244210 is an abundant number, since it is smaller than the sum of its proper divisors (32240399321550).

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

21123020244210 is a wasteful number, since it uses less digits than its factorization.

21123020244210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37057930282.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21123020244210 its reverse (1244202032112), we get a palindrome (22367222276322).

The spelling of 21123020244210 in words is "twenty-one trillion, one hundred twenty-three billion, twenty million, two hundred forty-four thousand, two hundred ten".