11921137 has 2 divisors, whose sum is σ = 11921138. Its totient is φ = 11921136.

The previous prime is 11921101. The next prime is 11921177. The reversal of 11921137 is 73112911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11840481 + 80656 = 3441^2 + 284^2 .

It is a cyclic number.

It is not a de Polignac number, because 11921137 - 2¹⁵ = 11888369 is a prime.

It is a super-2 number, since 2×11921137² = 284227014745538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11921177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5960568 + 5960569.

It is an arithmetic number, because the mean of its divisors is an integer number (5960569).

Almost surely, 2^11921137 is an apocalyptic number.

It is an amenable number.

11921137 is a deficient number, since it is larger than the sum of its proper divisors (1).

11921137 is an equidigital number, since it uses as much as digits as its factorization.

11921137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378, while the sum is 25.

The square root of 11921137 is about 3452.6999580039. The cubic root of 11921137 is about 228.4402147009.

The spelling of 11921137 in words is "eleven million, nine hundred twenty-one thousand, one hundred thirty-seven".