121221431401 has 8 divisors (see below), whose sum is σ = 138542718080. Its totient is φ = 103901129568.

The previous prime is 121221431389. The next prime is 121221431417. The reversal of 121221431401 is 104134122121.

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 121221431401 - 2⁷ = 121221431273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221431491) 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, 39685 + ... + 493981.

It is an arithmetic number, because the mean of its divisors is an integer number (17317839760).

Almost surely, 2^121221431401 is an apocalyptic number.

It is an amenable number.

121221431401 is a deficient number, since it is larger than the sum of its proper divisors (17321286679).

121221431401 is an equidigital number, since it uses as much as digits as its factorization.

121221431401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492423.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 121221431401 its reverse (104134122121), we get a palindrome (225355553522).

The spelling of 121221431401 in words is "one hundred twenty-one billion, two hundred twenty-one million, four hundred thirty-one thousand, four hundred one".