2131221023 has 8 divisors (see below), whose sum is σ = 2165612592. Its totient is φ = 2096905536.

The previous prime is 2131221011. The next prime is 2131221061. The reversal of 2131221023 is 3201221312.

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

It is a cyclic number.

It is not a de Polignac number, because 2131221023 - 2¹⁰ = 2131219999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131220992 and 2131221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131221523) 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, 38861 + ... + 75977.

It is an arithmetic number, because the mean of its divisors is an integer number (270701574).

Almost surely, 2^2131221023 is an apocalyptic number.

2131221023 is a deficient number, since it is larger than the sum of its proper divisors (34391569).

2131221023 is an equidigital number, since it uses as much as digits as its factorization.

2131221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38041.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2131221023 is about 46165.1494419762. The cubic root of 2131221023 is about 1286.8941614159.

Adding to 2131221023 its reverse (3201221312), we get a palindrome (5332442335).

The spelling of 2131221023 in words is "two billion, one hundred thirty-one million, two hundred twenty-one thousand, twenty-three".