21222156140215 has 16 divisors (see below), whose sum is σ = 26964933542208. Its totient is φ = 15978850546176.

The previous prime is 21222156140203. The next prime is 21222156140231. The reversal of 21222156140215 is 51204165122212.

It is a cyclic number.

It is not a de Polignac number, because 21222156140215 - 2¹⁵ = 21222156107447 is a prime.

It is a super-2 number, since 2×21222156140215² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 6191854 + ... + 8987956.

It is an arithmetic number, because the mean of its divisors is an integer number (1685308346388).

Almost surely, 2^{21222156140215} is an apocalyptic number.

21222156140215 is a deficient number, since it is larger than the sum of its proper divisors (5742777401993).

21222156140215 is a wasteful number, since it uses less digits than its factorization.

21222156140215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885418.

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 21222156140215 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred fifty-six million, one hundred forty thousand, two hundred fifteen".