100570120155 has 32 divisors (see below), whose sum is σ = 180462297600. Its totient is φ = 53136105696.

The previous prime is 100570120153. The next prime is 100570120159. The reversal of 100570120155 is 551021075001.

It is not a de Polignac number, because 100570120155 - 2¹ = 100570120153 is a prime.

It is a super-2 number, since 2×100570120155² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (100570120153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3466695 + ... + 3495584.

It is an arithmetic number, because the mean of its divisors is an integer number (5639446800).

Almost surely, 2^100570120155 is an apocalyptic number.

100570120155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100570120155 is a deficient number, since it is larger than the sum of its proper divisors (79892177445).

100570120155 is a wasteful number, since it uses less digits than its factorization.

100570120155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6962400 (or 6962394 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 27.

Adding to 100570120155 its reverse (551021075001), we get a palindrome (651591195156).

The spelling of 100570120155 in words is "one hundred billion, five hundred seventy million, one hundred twenty thousand, one hundred fifty-five".