2123120031 has 8 divisors (see below), whose sum is σ = 2831512704. Its totient is φ = 1415070360.

The previous prime is 2123120017. The next prime is 2123120047. The reversal of 2123120031 is 1300213212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2123120031 - 2⁶ = 2123119967 is a prime.

It is a super-2 number, since 2×2123120031² = 9015277332066881922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123120081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70941 + ... + 96326.

It is an arithmetic number, because the mean of its divisors is an integer number (353939088).

Almost surely, 2^2123120031 is an apocalyptic number.

2123120031 is a deficient number, since it is larger than the sum of its proper divisors (708392673).

2123120031 is a wasteful number, since it uses less digits than its factorization.

2123120031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171501.

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

The square root of 2123120031 is about 46077.3266477125. The cubic root of 2123120031 is about 1285.2615517296.

Adding to 2123120031 its reverse (1300213212), we get a palindrome (3423333243).

The spelling of 2123120031 in words is "two billion, one hundred twenty-three million, one hundred twenty thousand, thirty-one".