1137820121 has 4 divisors (see below), whose sum is σ = 1153406772. Its totient is φ = 1122233472.

The previous prime is 1137820109. The next prime is 1137820139. The reversal of 1137820121 is 1210287311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 237160000 + 900660121 = 15400^2 + 30011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1137820121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1137820141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7793216 + ... + 7793361.

It is an arithmetic number, because the mean of its divisors is an integer number (288351693).

Almost surely, 2^1137820121 is an apocalyptic number.

It is an amenable number.

1137820121 is a deficient number, since it is larger than the sum of its proper divisors (15586651).

1137820121 is an equidigital number, since it uses as much as digits as its factorization.

1137820121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15586650.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 1137820121 is about 33731.5893636810. The cubic root of 1137820121 is about 1043.9776547847.

The spelling of 1137820121 in words is "one billion, one hundred thirty-seven million, eight hundred twenty thousand, one hundred twenty-one".