21612756122 has 8 divisors (see below), whose sum is σ = 32460329856. Its totient is φ = 10792646172.

The previous prime is 21612756073. The next prime is 21612756133. The reversal of 21612756122 is 22165721612.

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

It is a super-2 number, since 2×21612756122² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6863978 + ... + 6867125.

It is an arithmetic number, because the mean of its divisors is an integer number (4057541232).

Almost surely, 2^21612756122 is an apocalyptic number.

21612756122 is a deficient number, since it is larger than the sum of its proper divisors (10847573734).

21612756122 is a wasteful number, since it uses less digits than its factorization.

21612756122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13731892.

The product of its digits is 20160, while the sum is 35.

The spelling of 21612756122 in words is "twenty-one billion, six hundred twelve million, seven hundred fifty-six thousand, one hundred twenty-two".