121905950 has 24 divisors (see below), whose sum is σ = 234062400. Its totient is φ = 47188800.

The previous prime is 121905943. The next prime is 121905983. The reversal of 121905950 is 59509121.

It is a super-2 number, since 2×121905950² = 29722121290805000, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37775 + ... + 40874.

It is an arithmetic number, because the mean of its divisors is an integer number (9752600).

Almost surely, 2^121905950 is an apocalyptic number.

121905950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121905950 is a deficient number, since it is larger than the sum of its proper divisors (112156450).

121905950 is a wasteful number, since it uses less digits than its factorization.

121905950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78692 (or 78687 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 121905950 is about 11041.1027528957. The cubic root of 121905950 is about 495.8400862171.

The spelling of 121905950 in words is "one hundred twenty-one million, nine hundred five thousand, nine hundred fifty".