157103216921 has 16 divisors (see below), whose sum is σ = 181424812800. Its totient is φ = 133251609600.

The previous prime is 157103216873. The next prime is 157103216923. The reversal of 157103216921 is 129612301751.

It is a cyclic number.

It is not a de Polignac number, because 157103216921 - 2¹⁴ = 157103200537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157103216923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6064805 + ... + 6090653.

It is an arithmetic number, because the mean of its divisors is an integer number (11339050800).

Almost surely, 2^157103216921 is an apocalyptic number.

It is an amenable number.

157103216921 is a deficient number, since it is larger than the sum of its proper divisors (24321595879).

157103216921 is an equidigital number, since it uses as much as digits as its factorization.

157103216921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34904.

The product of its (nonzero) digits is 22680, while the sum is 38.

The spelling of 157103216921 in words is "one hundred fifty-seven billion, one hundred three million, two hundred sixteen thousand, nine hundred twenty-one".