121305190 has 16 divisors (see below), whose sum is σ = 218579328. Its totient is φ = 48470976.

The previous prime is 121305179. The next prime is 121305199. The reversal of 121305190 is 91503121.

It is a super-2 number, since 2×121305190² = 29429898241872200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121305199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4459 + ... + 16201.

It is an arithmetic number, because the mean of its divisors is an integer number (13661208).

Almost surely, 2^121305190 is an apocalyptic number.

121305190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121305190 is a deficient number, since it is larger than the sum of its proper divisors (97274138).

121305190 is a wasteful number, since it uses less digits than its factorization.

121305190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12783.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 121305190 is about 11013.8635364708. The cubic root of 121305190 is about 495.0242344357.

The spelling of 121305190 in words is "one hundred twenty-one million, three hundred five thousand, one hundred ninety".