2221012311231 has 64 divisors (see below), whose sum is σ = 3522720481280. Its totient is φ = 1218229683840.

The previous prime is 2221012311191. The next prime is 2221012311239. The reversal of 2221012311231 is 1321132101222.

It is not a de Polignac number, because 2221012311231 - 2⁹ = 2221012310719 is a prime.

It is a super-2 number, since 2×2221012311231² (a number of 25 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 = 2221012311198 and 2221012311207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221012311239) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79231440 + ... + 79259466.

It is an arithmetic number, because the mean of its divisors is an integer number (55042507520).

Almost surely, 2^{2221012311231} is an apocalyptic number.

2221012311231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2221012311231 is a deficient number, since it is larger than the sum of its proper divisors (1301708170049).

2221012311231 is a wasteful number, since it uses less digits than its factorization.

2221012311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29444.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2221012311231 its reverse (1321132101222), we get a palindrome (3542144412453).

The spelling of 2221012311231 in words is "two trillion, two hundred twenty-one billion, twelve million, three hundred eleven thousand, two hundred thirty-one".