131121002 has 4 divisors (see below), whose sum is σ = 196681506. Its totient is φ = 65560500.

The previous prime is 131120989. The next prime is 131121031. The reversal of 131121002 is 200121131.

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

It can be written as a sum of positive squares in only one way, i.e., 91795561 + 39325441 = 9581^2 + 6271^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32780249 + ... + 32780252.

Almost surely, 2^131121002 is an apocalyptic number.

131121002 is a deficient number, since it is larger than the sum of its proper divisors (65560504).

131121002 is an equidigital number, since it uses as much as digits as its factorization.

131121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65560503.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 131121002 is about 11450.8079190946. The cubic root of 131121002 is about 508.0316310104.

Adding to 131121002 its reverse (200121131), we get a palindrome (331242133).

The spelling of 131121002 in words is "one hundred thirty-one million, one hundred twenty-one thousand, two".