121438069 has 2 divisors, whose sum is σ = 121438070. Its totient is φ = 121438068.

The previous prime is 121438061. The next prime is 121438073. The reversal of 121438069 is 960834121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118592100 + 2845969 = 10890^2 + 1687^2 .

It is a cyclic number.

It is not a de Polignac number, because 121438069 - 2³ = 121438061 is a prime.

It is a super-2 number, since 2×121438069² = 29494409204897522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121438061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60719034 + 60719035.

It is an arithmetic number, because the mean of its divisors is an integer number (60719035).

Almost surely, 2^121438069 is an apocalyptic number.

It is an amenable number.

121438069 is a deficient number, since it is larger than the sum of its proper divisors (1).

121438069 is an equidigital number, since it uses as much as digits as its factorization.

121438069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 121438069 is about 11019.8942372420. The cubic root of 121438069 is about 495.2049200870.

The spelling of 121438069 in words is "one hundred twenty-one million, four hundred thirty-eight thousand, sixty-nine".