121978022 has 4 divisors (see below), whose sum is σ = 182967036. Its totient is φ = 60989010.

The previous prime is 121978007. The next prime is 121978027. The reversal of 121978022 is 220879121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 220879121 = 3413 ⋅64717.

It is a self number, because there is not a number n which added to its sum of digits gives 121978022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121978027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30494504 + ... + 30494507.

It is an arithmetic number, because the mean of its divisors is an integer number (45741759).

Almost surely, 2^121978022 is an apocalyptic number.

121978022 is a deficient number, since it is larger than the sum of its proper divisors (60989014).

121978022 is an equidigital number, since it uses as much as digits as its factorization.

121978022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60989013.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 121978022 is about 11044.3660750629. The cubic root of 121978022 is about 495.9377821498.

The spelling of 121978022 in words is "one hundred twenty-one million, nine hundred seventy-eight thousand, twenty-two".