121652431 has 2 divisors, whose sum is σ = 121652432. Its totient is φ = 121652430.

The previous prime is 121652429. The next prime is 121652449. The reversal of 121652431 is 134256121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121652431 - 2¹ = 121652429 is a prime.

It is a super-2 number, since 2×121652431² = 29598627936419522, which contains 22 as substring.

Together with 121652429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 121652396 and 121652405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121652471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60826215 + 60826216.

It is an arithmetic number, because the mean of its divisors is an integer number (60826216).

Almost surely, 2^121652431 is an apocalyptic number.

121652431 is a deficient number, since it is larger than the sum of its proper divisors (1).

121652431 is an equidigital number, since it uses as much as digits as its factorization.

121652431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 121652431 is about 11029.6160857937. The cubic root of 121652431 is about 495.4961267318.

The spelling of 121652431 in words is "one hundred twenty-one million, six hundred fifty-two thousand, four hundred thirty-one".