202120023401 has 4 divisors (see below), whose sum is σ = 202556568192. Its totient is φ = 201683478612.

The previous prime is 202120023341. The next prime is 202120023407. The reversal of 202120023401 is 104320021202.

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 not a de Polignac number, because 202120023401 - 2¹⁴ = 202120007017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202120023401.

It is not an unprimeable number, because it can be changed into a prime (202120023407) 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, 218271701 + ... + 218272626.

It is an arithmetic number, because the mean of its divisors is an integer number (50639142048).

Almost surely, 2^202120023401 is an apocalyptic number.

It is an amenable number.

202120023401 is a deficient number, since it is larger than the sum of its proper divisors (436544791).

202120023401 is an equidigital number, since it uses as much as digits as its factorization.

202120023401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436544790.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 202120023401 its reverse (104320021202), we get a palindrome (306440044603).

The spelling of 202120023401 in words is "two hundred two billion, one hundred twenty million, twenty-three thousand, four hundred one".