121401431 has 8 divisors (see below), whose sum is σ = 127967280. Its totient is φ = 114853248.

The previous prime is 121401419. The next prime is 121401473. The reversal of 121401431 is 134104121.

It is a happy number.

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 121401431 - 2²² = 117207127 is a prime.

It is a super-2 number, since 2×121401431² = 29476614897695522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121401331) 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, 11135 + ... + 19151.

It is an arithmetic number, because the mean of its divisors is an integer number (15995910).

Almost surely, 2^121401431 is an apocalyptic number.

121401431 is a deficient number, since it is larger than the sum of its proper divisors (6565849).

121401431 is an equidigital number, since it uses as much as digits as its factorization.

121401431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8833.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 121401431 is about 11018.2317546873. The cubic root of 121401431 is about 495.1551137867.

Adding to 121401431 its reverse (134104121), we get a palindrome (255505552).

The spelling of 121401431 in words is "one hundred twenty-one million, four hundred one thousand, four hundred thirty-one".