202142100023 has 4 divisors (see below), whose sum is σ = 205159146360. Its totient is φ = 199125053688.

The previous prime is 202142099987. The next prime is 202142100089. The reversal of 202142100023 is 320001241202.

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

It is a cyclic number.

It is not a de Polignac number, because 202142100023 - 2⁶ = 202142099959 is a prime.

It is a super-2 number, since 2×202142100023² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202142099974 and 202142100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202142300023) 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, 1508523068 + ... + 1508523201.

It is an arithmetic number, because the mean of its divisors is an integer number (51289786590).

Almost surely, 2^202142100023 is an apocalyptic number.

202142100023 is a deficient number, since it is larger than the sum of its proper divisors (3017046337).

202142100023 is an equidigital number, since it uses as much as digits as its factorization.

202142100023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017046336.

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

Adding to 202142100023 its reverse (320001241202), we get a palindrome (522143341225).

The spelling of 202142100023 in words is "two hundred two billion, one hundred forty-two million, one hundred thousand, twenty-three".