121420689 has 16 divisors (see below), whose sum is σ = 174562752. Its totient is φ = 74628288.

The previous prime is 121420669. The next prime is 121420699. The reversal of 121420689 is 986024121.

It is not a de Polignac number, because 121420689 - 2⁹ = 121420177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121420669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44019 + ... + 46695.

It is an arithmetic number, because the mean of its divisors is an integer number (10910172).

Almost surely, 2^121420689 is an apocalyptic number.

It is an amenable number.

121420689 is a deficient number, since it is larger than the sum of its proper divisors (53142063).

121420689 is a wasteful number, since it uses less digits than its factorization.

121420689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 121420689 is about 11019.1056352138. The cubic root of 121420689 is about 495.1812946780.

The spelling of 121420689 in words is "one hundred twenty-one million, four hundred twenty thousand, six hundred eighty-nine".