2217121210157 has 8 divisors (see below), whose sum is σ = 2595654100032. Its totient is φ = 1854038642400.

The previous prime is 2217121210123. The next prime is 2217121210177. The reversal of 2217121210157 is 7510121217122.

2217121210157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2217121210157 - 2⁶ = 2217121210093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217121210177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3862580219 + ... + 3862580792.

It is an arithmetic number, because the mean of its divisors is an integer number (324456762504).

Almost surely, 2^{2217121210157} is an apocalyptic number.

It is an amenable number.

2217121210157 is a deficient number, since it is larger than the sum of its proper divisors (378532889875).

2217121210157 is an equidigital number, since it uses as much as digits as its factorization.

2217121210157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7725161059.

The product of its (nonzero) digits is 3920, while the sum is 32.

Adding to 2217121210157 its reverse (7510121217122), we get a palindrome (9727242427279).

The spelling of 2217121210157 in words is "two trillion, two hundred seventeen billion, one hundred twenty-one million, two hundred ten thousand, one hundred fifty-seven".