21123021231122 has 32 divisors (see below), whose sum is σ = 32922652435200. Its totient is φ = 10156192603200.

The previous prime is 21123021231107. The next prime is 21123021231131. The reversal of 21123021231122 is 22113212032112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2596622 + ... + 6999177.

It is an arithmetic number, because the mean of its divisors is an integer number (1028832888600).

Almost surely, 2^{21123021231122} is an apocalyptic number.

21123021231122 is a deficient number, since it is larger than the sum of its proper divisors (11799631204078).

21123021231122 is a wasteful number, since it uses less digits than its factorization.

21123021231122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9596186.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21123021231122 its reverse (22113212032112), we get a palindrome (43236233263234).

The spelling of 21123021231122 in words is "twenty-one trillion, one hundred twenty-three billion, twenty-one million, two hundred thirty-one thousand, one hundred twenty-two".