21123031022 has 8 divisors (see below), whose sum is σ = 31686614400. Its totient is φ = 10560826224.

The previous prime is 21123031001. The next prime is 21123031057. The reversal of 21123031022 is 22013032112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305447 + ... + 368162.

It is an arithmetic number, because the mean of its divisors is an integer number (3960826800).

Almost surely, 2^21123031022 is an apocalyptic number.

21123031022 is a deficient number, since it is larger than the sum of its proper divisors (10563583378).

21123031022 is a wasteful number, since it uses less digits than its factorization.

21123031022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689290.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21123031022 its reverse (22013032112), we get a palindrome (43136063134).

The spelling of 21123031022 in words is "twenty-one billion, one hundred twenty-three million, thirty-one thousand, twenty-two".