1201021131 has 16 divisors (see below), whose sum is σ = 1628902688. Its totient is φ = 786931200.

The previous prime is 1201021111. The next prime is 1201021139. The reversal of 1201021131 is 1311201021.

It is not a de Polignac number, because 1201021131 - 2⁶ = 1201021067 is a prime.

It is a super-2 number, since 2×1201021131² = 2884903514217038322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201021139) 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, 393945 + ... + 396981.

It is an arithmetic number, because the mean of its divisors is an integer number (101806418).

Almost surely, 2^1201021131 is an apocalyptic number.

1201021131 is a deficient number, since it is larger than the sum of its proper divisors (427881557).

1201021131 is a wasteful number, since it uses less digits than its factorization.

1201021131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5262.

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

The square root of 1201021131 is about 34655.7517736955. The cubic root of 1201021131 is about 1062.9599041724.

Adding to 1201021131 its reverse (1311201021), we get a palindrome (2512222152).

It can be divided in two parts, 1201021 and 131, that multiplied together give a palindrome (157333751).

The spelling of 1201021131 in words is "one billion, two hundred one million, twenty-one thousand, one hundred thirty-one".