2101322031 has 4 divisors (see below), whose sum is σ = 2801762712. Its totient is φ = 1400881352.

The previous prime is 2101322023. The next prime is 2101322053. The reversal of 2101322031 is 1302231012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2101322031 - 2³ = 2101322023 is a prime.

It is a super-2 number, since 2×2101322031² = 8831108555931929922, 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 2101322031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101322231) 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, 350220336 + ... + 350220341.

It is an arithmetic number, because the mean of its divisors is an integer number (700440678).

Almost surely, 2^2101322031 is an apocalyptic number.

2101322031 is a deficient number, since it is larger than the sum of its proper divisors (700440681).

2101322031 is an equidigital number, since it uses as much as digits as its factorization.

2101322031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700440680.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2101322031 is about 45840.1792208538. The cubic root of 2101322031 is about 1280.8478332757.

Adding to 2101322031 its reverse (1302231012), we get a palindrome (3403553043).

The spelling of 2101322031 in words is "two billion, one hundred one million, three hundred twenty-two thousand, thirty-one".