2101021131 has 24 divisors (see below), whose sum is σ = 3113827920. Its totient is φ = 1259019520.

The previous prime is 2101021127. The next prime is 2101021133. The reversal of 2101021131 is 1311201012.

It is not a de Polignac number, because 2101021131 - 2² = 2101021127 is a prime.

It is a super-2 number, since 2×2101021131² = 8828579585817038322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2101021133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210 + ... + 64823.

It is an arithmetic number, because the mean of its divisors is an integer number (129742830).

Almost surely, 2^2101021131 is an apocalyptic number.

2101021131 is a deficient number, since it is larger than the sum of its proper divisors (1012806789).

2101021131 is a wasteful number, since it uses less digits than its factorization.

2101021131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65147 (or 65136 counting only the distinct ones).

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

The square root of 2101021131 is about 45836.8970481205. The cubic root of 2101021131 is about 1280.7866931133.

Adding to 2101021131 its reverse (1311201012), we get a palindrome (3412222143).

The spelling of 2101021131 in words is "two billion, one hundred one million, twenty-one thousand, one hundred thirty-one".