121116285157 has 4 divisors (see below), whose sum is σ = 138418611616. Its totient is φ = 103813958700.

The previous prime is 121116285127. The next prime is 121116285161. The reversal of 121116285157 is 751582611121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 751582611121 = 383 ⋅1962356687.

It is a cyclic number.

It is not a de Polignac number, because 121116285157 - 2²³ = 121107896549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121116285127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8651163219 + ... + 8651163232.

It is an arithmetic number, because the mean of its divisors is an integer number (34604652904).

Almost surely, 2^121116285157 is an apocalyptic number.

It is an amenable number.

121116285157 is a deficient number, since it is larger than the sum of its proper divisors (17302326459).

121116285157 is an equidigital number, since it uses as much as digits as its factorization.

121116285157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17302326458.

The product of its digits is 33600, while the sum is 40.

Adding to 121116285157 its reverse (751582611121), we get a palindrome (872698896278).

The spelling of 121116285157 in words is "one hundred twenty-one billion, one hundred sixteen million, two hundred eighty-five thousand, one hundred fifty-seven".