2137001021 has 4 divisors (see below), whose sum is σ = 2137242432. Its totient is φ = 2136759612.

The previous prime is 2137000967. The next prime is 2137001023. The reversal of 2137001021 is 1201007312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2137001021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2137001023) 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, 106901 + ... + 125306.

It is an arithmetic number, because the mean of its divisors is an integer number (534310608).

Almost surely, 2^2137001021 is an apocalyptic number.

It is an amenable number.

2137001021 is a deficient number, since it is larger than the sum of its proper divisors (241411).

2137001021 is an equidigital number, since it uses as much as digits as its factorization.

2137001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241410.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 2137001021 is about 46227.7083684666. The cubic root of 2137001021 is about 1288.0564890818.

Adding to 2137001021 its reverse (1201007312), we get a palindrome (3338008333).

The spelling of 2137001021 in words is "two billion, one hundred thirty-seven million, one thousand, twenty-one".