16212653121 has 16 divisors (see below), whose sum is σ = 24769511424. Its totient is φ = 9240179664.

The previous prime is 16212653113. The next prime is 16212653123. The reversal of 16212653121 is 12135621261.

It is not a de Polignac number, because 16212653121 - 2³ = 16212653113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16212653123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 999831 + ... + 1015916.

It is an arithmetic number, because the mean of its divisors is an integer number (1548094464).

Almost surely, 2^16212653121 is an apocalyptic number.

It is an amenable number.

16212653121 is a deficient number, since it is larger than the sum of its proper divisors (8556858303).

16212653121 is a wasteful number, since it uses less digits than its factorization.

16212653121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016140.

The product of its digits is 4320, while the sum is 30.

The spelling of 16212653121 in words is "sixteen billion, two hundred twelve million, six hundred fifty-three thousand, one hundred twenty-one".