1113421961 has 2 divisors, whose sum is σ = 1113421962. Its totient is φ = 1113421960.

The previous prime is 1113421949. The next prime is 1113422033. The reversal of 1113421961 is 1691243111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 981631561 + 131790400 = 31331^2 + 11480^2 .

It is an emirp because it is prime and its reverse (1691243111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1113421961 - 2¹⁴ = 1113405577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1113421901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556710980 + 556710981.

It is an arithmetic number, because the mean of its divisors is an integer number (556710981).

Almost surely, 2^1113421961 is an apocalyptic number.

It is an amenable number.

1113421961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113421961 is an equidigital number, since it uses as much as digits as its factorization.

1113421961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 29.

The square root of 1113421961 is about 33367.9780777919. The cubic root of 1113421961 is about 1036.4617062336.

The spelling of 1113421961 in words is "one billion, one hundred thirteen million, four hundred twenty-one thousand, nine hundred sixty-one".