121990710 has 16 divisors (see below), whose sum is σ = 292777776. Its totient is φ = 32530848.

The previous prime is 121990681. The next prime is 121990711. The reversal of 121990710 is 17099121.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 4066357 = 121990710 / (1 + 2 + 1 + 9 + 9 + 0 + 7 + 1 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121990711) 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, 2033149 + ... + 2033208.

It is an arithmetic number, because the mean of its divisors is an integer number (18298611).

Almost surely, 2^121990710 is an apocalyptic number.

121990710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121990710 is an abundant number, since it is smaller than the sum of its proper divisors (170787066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121990710 is a wasteful number, since it uses less digits than its factorization.

121990710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4066367.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 121990710 is about 11044.9404706408. The cubic root of 121990710 is about 495.9549771611.

The spelling of 121990710 in words is "one hundred twenty-one million, nine hundred ninety thousand, seven hundred ten".