12220211220231 has 24 divisors (see below), whose sum is σ = 19024257268080. Its totient is φ = 6957018792192.

The previous prime is 12220211220223. The next prime is 12220211220251. The reversal of 12220211220231 is 13202211202221.

It is not a de Polignac number, because 12220211220231 - 2³ = 12220211220223 is a prime.

It is a super-2 number, since 2×12220211220231² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 12220211220198 and 12220211220207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220211220221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154478466 + ... + 154557551.

It is an arithmetic number, because the mean of its divisors is an integer number (792677386170).

Almost surely, 2^{12220211220231} is an apocalyptic number.

12220211220231 is a deficient number, since it is larger than the sum of its proper divisors (6804046047849).

12220211220231 is a wasteful number, since it uses less digits than its factorization.

12220211220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309036303 (or 309036296 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 12220211220231 its reverse (13202211202221), we get a palindrome (25422422422452).

The spelling of 12220211220231 in words is "twelve trillion, two hundred twenty billion, two hundred eleven million, two hundred twenty thousand, two hundred thirty-one".