121312770 has 16 divisors (see below), whose sum is σ = 291150720. Its totient is φ = 32350064.

The previous prime is 121312757. The next prime is 121312783. The reversal of 121312770 is 77213121.

It is an interprime number because it is at equal distance from previous prime (121312757) and next prime (121312783).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121312770.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2021850 + ... + 2021909.

It is an arithmetic number, because the mean of its divisors is an integer number (18196920).

Almost surely, 2^121312770 is an apocalyptic number.

121312770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121312770 is an abundant number, since it is smaller than the sum of its proper divisors (169837950).

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

121312770 is a wasteful number, since it uses less digits than its factorization.

121312770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043769.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 121312770 is about 11014.2076428584. The cubic root of 121312770 is about 495.0345450843.

Adding to 121312770 its reverse (77213121), we get a palindrome (198525891).

The spelling of 121312770 in words is "one hundred twenty-one million, three hundred twelve thousand, seven hundred seventy".