121284979 has 2 divisors, whose sum is σ = 121284980. Its totient is φ = 121284978.

The previous prime is 121284959. The next prime is 121285033. The reversal of 121284979 is 979482121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121284979 - 2¹⁹ = 120760691 is a prime.

It is a super-2 number, since 2×121284979² = 29420092262060882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121284959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60642489 + 60642490.

It is an arithmetic number, because the mean of its divisors is an integer number (60642490).

Almost surely, 2^121284979 is an apocalyptic number.

121284979 is a deficient number, since it is larger than the sum of its proper divisors (1).

121284979 is an equidigital number, since it uses as much as digits as its factorization.

121284979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 43.

The square root of 121284979 is about 11012.9459728085. The cubic root of 121284979 is about 494.9967404472.

The spelling of 121284979 in words is "one hundred twenty-one million, two hundred eighty-four thousand, nine hundred seventy-nine".