122921431 has 8 divisors (see below), whose sum is σ = 129596720. Its totient is φ = 116266752.

The previous prime is 122921387. The next prime is 122921443. The reversal of 122921431 is 134129221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122921431 - 2⁷ = 122921303 is a prime.

It is a super-2 number, since 2×122921431² = 30219356398175522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122921396 and 122921405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122921471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7981 + ... + 17593.

It is an arithmetic number, because the mean of its divisors is an integer number (16199590).

Almost surely, 2^122921431 is an apocalyptic number.

122921431 is a deficient number, since it is larger than the sum of its proper divisors (6675289).

122921431 is an equidigital number, since it uses as much as digits as its factorization.

122921431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10305.

The product of its digits is 864, while the sum is 25.

The square root of 122921431 is about 11086.9937764932. The cubic root of 122921431 is about 497.2130695656.

The spelling of 122921431 in words is "one hundred twenty-two million, nine hundred twenty-one thousand, four hundred thirty-one".