121369390 has 32 divisors (see below), whose sum is σ = 228868416. Its totient is φ = 46252800.

The previous prime is 121369387. The next prime is 121369399. The reversal of 121369390 is 93963121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121369399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66490 + ... + 68290.

It is an arithmetic number, because the mean of its divisors is an integer number (7152138).

Almost surely, 2^121369390 is an apocalyptic number.

121369390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121369390 is a deficient number, since it is larger than the sum of its proper divisors (107499026).

121369390 is a wasteful number, since it uses less digits than its factorization.

121369390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 121369390 is about 11016.7776595518. Note that the first 3 decimals coincide. The cubic root of 121369390 is about 495.1115485095. Note that the first 3 decimals are identical.

The spelling of 121369390 in words is "one hundred twenty-one million, three hundred sixty-nine thousand, three hundred ninety".