1202131131 has 4 divisors (see below), whose sum is σ = 1602841512. Its totient is φ = 801420752.

The previous prime is 1202131129. The next prime is 1202131163. The reversal of 1202131131 is 1311312021.

It is a happy number.

1202131131 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1311312021 = 3 ⋅437104007.

It is a cyclic number.

It is not a de Polignac number, because 1202131131 - 2¹ = 1202131129 is a prime.

It is a super-2 number, since 2×1202131131² = 2890238512238678322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1202131131.

It is not an unprimeable number, because it can be changed into a prime (1202131181) 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, 200355186 + ... + 200355191.

It is an arithmetic number, because the mean of its divisors is an integer number (400710378).

Almost surely, 2^1202131131 is an apocalyptic number.

1202131131 is a deficient number, since it is larger than the sum of its proper divisors (400710381).

1202131131 is an equidigital number, since it uses as much as digits as its factorization.

1202131131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400710380.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1202131131 is about 34671.7627328061. The cubic root of 1202131131 is about 1063.2872706555.

Adding to 1202131131 its reverse (1311312021), we get a palindrome (2513443152).

The spelling of 1202131131 in words is "one billion, two hundred two million, one hundred thirty-one thousand, one hundred thirty-one".