2121312032023 has 4 divisors (see below), whose sum is σ = 2125953853120. Its totient is φ = 2116670210928.

The previous prime is 2121312032017. The next prime is 2121312032027. The reversal of 2121312032023 is 3202302131212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121312032023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121312031985 and 2121312032003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121312032027) 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, 2320909863 + ... + 2320910776.

It is an arithmetic number, because the mean of its divisors is an integer number (531488463280).

Almost surely, 2^{2121312032023} is an apocalyptic number.

2121312032023 is a deficient number, since it is larger than the sum of its proper divisors (4641821097).

2121312032023 is an equidigital number, since it uses as much as digits as its factorization.

2121312032023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4641821096.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 2121312032023 its reverse (3202302131212), we get a palindrome (5323614163235).

The spelling of 2121312032023 in words is "two trillion, one hundred twenty-one billion, three hundred twelve million, thirty-two thousand, twenty-three".