121922490 has 16 divisors (see below), whose sum is σ = 292614048. Its totient is φ = 32512656.

The previous prime is 121922477. The next prime is 121922509. The reversal of 121922490 is 94229121.

It is a happy number.

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: 4064083 = 121922490 / (1 + 2 + 1 + 9 + 2 + 2 + 4 + 9 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2032012 + ... + 2032071.

It is an arithmetic number, because the mean of its divisors is an integer number (18288378).

Almost surely, 2^121922490 is an apocalyptic number.

121922490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121922490 is an abundant number, since it is smaller than the sum of its proper divisors (170691558).

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

121922490 is a wasteful number, since it uses less digits than its factorization.

121922490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4064093.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 121922490 is about 11041.8517468765. The cubic root of 121922490 is about 495.8625101270.

The spelling of 121922490 in words is "one hundred twenty-one million, nine hundred twenty-two thousand, four hundred ninety".