121443980 has 24 divisors (see below), whose sum is σ = 291465888. Its totient is φ = 41637888.

The previous prime is 121443923. The next prime is 121443983. The reversal of 121443980 is 89344121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121443983) 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, 433589 + ... + 433868.

It is an arithmetic number, because the mean of its divisors is an integer number (12144412).

Almost surely, 2^121443980 is an apocalyptic number.

121443980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121443980 is an abundant number, since it is smaller than the sum of its proper divisors (170021908).

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

121443980 is a wasteful number, since it uses less digits than its factorization.

121443980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867473 (or 867471 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 121443980 is about 11020.1624307448. The cubic root of 121443980 is about 495.2129546591.

The spelling of 121443980 in words is "one hundred twenty-one million, four hundred forty-three thousand, nine hundred eighty".