1122112212521 has 2 divisors, whose sum is σ = 1122112212522. Its totient is φ = 1122112212520.

The previous prime is 1122112212493. The next prime is 1122112212527. The reversal of 1122112212521 is 1252122112211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 830659074025 + 291453138496 = 911405^2 + 539864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122112212521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1122112212527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561056106260 + 561056106261.

It is an arithmetic number, because the mean of its divisors is an integer number (561056106261).

Almost surely, 2^{1122112212521} is an apocalyptic number.

It is an amenable number.

1122112212521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122112212521 is an equidigital number, since it uses as much as digits as its factorization.

1122112212521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 23.

Adding to 1122112212521 its reverse (1252122112211), we get a palindrome (2374234324732).

The spelling of 1122112212521 in words is "one trillion, one hundred twenty-two billion, one hundred twelve million, two hundred twelve thousand, five hundred twenty-one".