121022989 has 4 divisors (see below), whose sum is σ = 127392640. Its totient is φ = 114653340.

The previous prime is 121022981. The next prime is 121023013. The reversal of 121022989 is 989220121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 989220121 = 809 ⋅1222769.

It is a cyclic number.

It is not a de Polignac number, because 121022989 - 2³ = 121022981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3184797 + ... + 3184834.

It is an arithmetic number, because the mean of its divisors is an integer number (31848160).

Almost surely, 2^121022989 is an apocalyptic number.

121022989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

121022989 is a deficient number, since it is larger than the sum of its proper divisors (6369651).

121022989 is an equidigital number, since it uses as much as digits as its factorization.

121022989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6369650.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 121022989 is about 11001.0449049170. The cubic root of 121022989 is about 494.6400661992.

The spelling of 121022989 in words is "one hundred twenty-one million, twenty-two thousand, nine hundred eighty-nine".