121157069 has 4 divisors (see below), whose sum is σ = 132171360. Its totient is φ = 110142780.

The previous prime is 121157059. The next prime is 121157081. The reversal of 121157069 is 960751121.

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.

It is a de Polignac number, because none of the positive numbers 2^k-121157069 is a prime.

It is a super-2 number, since 2×121157069² = 29358070737341522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121157059) 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, 5507129 + ... + 5507150.

It is an arithmetic number, because the mean of its divisors is an integer number (33042840).

Almost surely, 2^121157069 is an apocalyptic number.

It is an amenable number.

121157069 is a deficient number, since it is larger than the sum of its proper divisors (11014291).

121157069 is a wasteful number, since it uses less digits than its factorization.

121157069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11014290.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 121157069 is about 11007.1371845726. The cubic root of 121157069 is about 494.8226674925.

The spelling of 121157069 in words is "one hundred twenty-one million, one hundred fifty-seven thousand, sixty-nine".