202123315155 has 32 divisors (see below), whose sum is σ = 332659914048. Its totient is φ = 104733388800.

The previous prime is 202123315139. The next prime is 202123315157. The reversal of 202123315155 is 551513321202.

It is not a de Polignac number, because 202123315155 - 2⁴ = 202123315139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (202123315157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 533644 + ... + 830073.

It is an arithmetic number, because the mean of its divisors is an integer number (10395622314).

Almost surely, 2^202123315155 is an apocalyptic number.

202123315155 is a deficient number, since it is larger than the sum of its proper divisors (130536598893).

202123315155 is a wasteful number, since it uses less digits than its factorization.

202123315155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364007.

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 202123315155 its reverse (551513321202), we get a palindrome (753636636357).

The spelling of 202123315155 in words is "two hundred two billion, one hundred twenty-three million, three hundred fifteen thousand, one hundred fifty-five".