2221112221931 has 2 divisors, whose sum is σ = 2221112221932. Its totient is φ = 2221112221930.

The previous prime is 2221112221877. The next prime is 2221112221957. The reversal of 2221112221931 is 1391222111222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221112221931 - 2²² = 2221108027627 is a prime.

It is a super-2 number, since 2×2221112221931² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221112221894 and 2221112221903.

It is not a weakly prime, because it can be changed into another prime (2221112221981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110556110965 + 1110556110966.

It is an arithmetic number, because the mean of its divisors is an integer number (1110556110966).

Almost surely, 2^{2221112221931} is an apocalyptic number.

2221112221931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221112221931 is an equidigital number, since it uses as much as digits as its factorization.

2221112221931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The spelling of 2221112221931 in words is "two trillion, two hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, nine hundred thirty-one".