121312432221431 has 8 divisors (see below), whose sum is σ = 135917614479504. Its totient is φ = 107303379851520.

The previous prime is 121312432221427. The next prime is 121312432221433. The reversal of 121312432221431 is 134122234213121.

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 121312432221431 - 2² = 121312432221427 is a prime.

It is a super-2 number, since 2×121312432221431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121312432221433) 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, 149032471610 + ... + 149032472423.

It is an arithmetic number, because the mean of its divisors is an integer number (16989701809938).

Almost surely, 2^{121312432221431} is an apocalyptic number.

121312432221431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121312432221431 is a deficient number, since it is larger than the sum of its proper divisors (14605182258073).

121312432221431 is a wasteful number, since it uses less digits than its factorization.

121312432221431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298064944081.

The product of its digits is 13824, while the sum is 32.

Adding to 121312432221431 its reverse (134122234213121), we get a palindrome (255434666434552).

The spelling of 121312432221431 in words is "one hundred twenty-one trillion, three hundred twelve billion, four hundred thirty-two million, two hundred twenty-one thousand, four hundred thirty-one".