121511157 has 8 divisors (see below), whose sum is σ = 162157920. Its totient is φ = 80935920.

The previous prime is 121511147. The next prime is 121511161. The reversal of 121511157 is 751115121.

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

It is not a de Polignac number, because 121511157 - 2⁷ = 121511029 is a prime.

It is a super-2 number, since 2×121511157² = 29529922550957298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121511147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13782 + ... + 20807.

It is an arithmetic number, because the mean of its divisors is an integer number (20269740).

Almost surely, 2^121511157 is an apocalyptic number.

It is an amenable number.

121511157 is a deficient number, since it is larger than the sum of its proper divisors (40646763).

121511157 is a wasteful number, since it uses less digits than its factorization.

121511157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35763.

The product of its digits is 350, while the sum is 24.

The square root of 121511157 is about 11023.2099227040. The cubic root of 121511157 is about 495.3042472003.

Adding to 121511157 its reverse (751115121), we get a palindrome (872626278).

The spelling of 121511157 in words is "one hundred twenty-one million, five hundred eleven thousand, one hundred fifty-seven".