12219312921 has 8 divisors (see below), whose sum is σ = 17250794784. Its totient is φ = 7667019840.

The previous prime is 12219312877. The next prime is 12219312947. The reversal of 12219312921 is 12921391221.

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

It is not a de Polignac number, because 12219312921 - 2¹⁵ = 12219280153 is a prime.

It is a super-2 number, since 2×12219312921² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12219312961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119797135 + ... + 119797236.

It is an arithmetic number, because the mean of its divisors is an integer number (2156349348).

Almost surely, 2^12219312921 is an apocalyptic number.

It is an amenable number.

12219312921 is a deficient number, since it is larger than the sum of its proper divisors (5031481863).

12219312921 is a wasteful number, since it uses less digits than its factorization.

12219312921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239594391.

The product of its digits is 3888, while the sum is 33.

The spelling of 12219312921 in words is "twelve billion, two hundred nineteen million, three hundred twelve thousand, nine hundred twenty-one".