2021310123 has 24 divisors (see below), whose sum is σ = 3144055248. Its totient is φ = 1151732736.

The previous prime is 2021310107. The next prime is 2021310163. The reversal of 2021310123 is 3210131202.

It is not a de Polignac number, because 2021310123 - 2⁴ = 2021310107 is a prime.

It is a super-2 number, since 2×2021310123² = 8171389226684550258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021310163) 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, 32415 + ... + 71367.

It is an arithmetic number, because the mean of its divisors is an integer number (131002302).

Almost surely, 2^2021310123 is an apocalyptic number.

2021310123 is a deficient number, since it is larger than the sum of its proper divisors (1122745125).

2021310123 is a wasteful number, since it uses less digits than its factorization.

2021310123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39323 (or 39316 counting only the distinct ones).

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

The square root of 2021310123 is about 44958.9826730988. The cubic root of 2021310123 is about 1264.3800954844.

Adding to 2021310123 its reverse (3210131202), we get a palindrome (5231441325).

The spelling of 2021310123 in words is "two billion, twenty-one million, three hundred ten thousand, one hundred twenty-three".