121039990 has 8 divisors (see below), whose sum is σ = 217872000. Its totient is φ = 48415992.

The previous prime is 121039973. The next prime is 121039991. The reversal of 121039990 is 99930121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121039991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6051990 + ... + 6052009.

It is an arithmetic number, because the mean of its divisors is an integer number (27234000).

Almost surely, 2^121039990 is an apocalyptic number.

121039990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121039990 is a deficient number, since it is larger than the sum of its proper divisors (96832010).

121039990 is a wasteful number, since it uses less digits than its factorization.

121039990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12104006.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 121039990 is about 11001.8175771097. The cubic root of 121039990 is about 494.6632270386.

The spelling of 121039990 in words is "one hundred twenty-one million, thirty-nine thousand, nine hundred ninety".