2121670175157 has 24 divisors (see below), whose sum is σ = 3316017458208. Its totient is φ = 1299455287200.

The previous prime is 2121670175143. The next prime is 2121670175159. The reversal of 2121670175157 is 7515710761212.

2121670175157 is a `hidden beast` number, since 2 + 121 + 6 + 7 + 0 + 1 + 7 + 515 + 7 = 666.

It is not a de Polignac number, because 2121670175157 - 2²⁸ = 2121401739701 is a prime.

It is a super-3 number, since 3×2121670175157³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121670175159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42946719 + ... + 42996092.

It is an arithmetic number, because the mean of its divisors is an integer number (138167394092).

Almost surely, 2^{2121670175157} is an apocalyptic number.

It is an amenable number.

2121670175157 is a deficient number, since it is larger than the sum of its proper divisors (1194347283051).

2121670175157 is a wasteful number, since it uses less digits than its factorization.

2121670175157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85943041 (or 85943038 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 45.

The spelling of 2121670175157 in words is "two trillion, one hundred twenty-one billion, six hundred seventy million, one hundred seventy-five thousand, one hundred fifty-seven".