2123011231 has 4 divisors (see below), whose sum is σ = 2316012264. Its totient is φ = 1930010200.

The previous prime is 2123011229. The next prime is 2123011309. The reversal of 2123011231 is 1321103212.

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 2123011231 - 2¹ = 2123011229 is a prime.

It is a super-2 number, since 2×2123011231² = 9014353373904270722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123311231) 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, 96500500 + ... + 96500521.

It is an arithmetic number, because the mean of its divisors is an integer number (579003066).

Almost surely, 2^2123011231 is an apocalyptic number.

2123011231 is a deficient number, since it is larger than the sum of its proper divisors (193001033).

2123011231 is a wasteful number, since it uses less digits than its factorization.

2123011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193001032.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2123011231 is about 46076.1460085368. The cubic root of 2123011231 is about 1285.2395968011.

Adding to 2123011231 its reverse (1321103212), we get a palindrome (3444114443).

The spelling of 2123011231 in words is "two billion, one hundred twenty-three million, eleven thousand, two hundred thirty-one".