2120023321501 has 4 divisors (see below), whose sum is σ = 2120392476352. Its totient is φ = 2119654166652.

The previous prime is 2120023321457. The next prime is 2120023321567. The reversal of 2120023321501 is 1051233200212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120023321501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120053321501) 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, 184568811 + ... + 184580296.

It is an arithmetic number, because the mean of its divisors is an integer number (530098119088).

Almost surely, 2^{2120023321501} is an apocalyptic number.

It is an amenable number.

2120023321501 is a deficient number, since it is larger than the sum of its proper divisors (369154851).

2120023321501 is an equidigital number, since it uses as much as digits as its factorization.

2120023321501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369154850.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 2120023321501 its reverse (1051233200212), we get a palindrome (3171256521713).

The spelling of 2120023321501 in words is "two trillion, one hundred twenty billion, twenty-three million, three hundred twenty-one thousand, five hundred one".