121351690 has 16 divisors (see below), whose sum is σ = 218860128. Its totient is φ = 48445776.

The previous prime is 121351669. The next prime is 121351733. The reversal of 121351690 is 96153121.

It is a super-2 number, since 2×121351690² = 29452465331712200, which contains 22 as substring.

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, 6372 + ... + 16831.

It is an arithmetic number, because the mean of its divisors is an integer number (13678758).

Almost surely, 2^121351690 is an apocalyptic number.

121351690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121351690 is a deficient number, since it is larger than the sum of its proper divisors (97508438).

121351690 is a wasteful number, since it uses less digits than its factorization.

121351690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23733.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 121351690 is about 11015.9743100645. The cubic root of 121351690 is about 495.0874790127.

The spelling of 121351690 in words is "one hundred twenty-one million, three hundred fifty-one thousand, six hundred ninety".