121157070 has 64 divisors (see below), whose sum is σ = 307307520. Its totient is φ = 30520448.

The previous prime is 121157059. The next prime is 121157081. The reversal of 121157070 is 70751121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121157059) and next prime (121157081).

It is a super-2 number, since 2×121157070² = 29358071221969800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121157070.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39409 + ... + 42371.

It is an arithmetic number, because the mean of its divisors is an integer number (4801680).

Almost surely, 2^121157070 is an apocalyptic number.

121157070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121157070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153653760).

121157070 is an abundant number, since it is smaller than the sum of its proper divisors (186150450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121157070 is a wasteful number, since it uses less digits than its factorization.

121157070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3049.

The product of its (nonzero) digits is 490, while the sum is 24.

The square root of 121157070 is about 11007.1372299976. The cubic root of 121157070 is about 494.8226688539.

The spelling of 121157070 in words is "one hundred twenty-one million, one hundred fifty-seven thousand, seventy".