1200421131 has 16 divisors (see below), whose sum is σ = 1969922304. Its totient is φ = 633189024.

The previous prime is 1200421127. The next prime is 1200421171. The reversal of 1200421131 is 1311240021.

It is not a de Polignac number, because 1200421131 - 2² = 1200421127 is a prime.

It is a super-2 number, since 2×1200421131² = 2882021783502638322, 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 1200421131.

It is not an unprimeable number, because it can be changed into a prime (1200421171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2198301 + ... + 2198846.

It is an arithmetic number, because the mean of its divisors is an integer number (123120144).

Almost surely, 2^1200421131 is an apocalyptic number.

1200421131 is a deficient number, since it is larger than the sum of its proper divisors (769501173).

1200421131 is a wasteful number, since it uses less digits than its factorization.

1200421131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397170.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1200421131 is about 34647.0941205752. The cubic root of 1200421131 is about 1062.7828653284.

Adding to 1200421131 its reverse (1311240021), we get a palindrome (2511661152).

The spelling of 1200421131 in words is "one billion, two hundred million, four hundred twenty-one thousand, one hundred thirty-one".