121430031431 has 4 divisors (see below), whose sum is σ = 121796889864. Its totient is φ = 121063173000.

The previous prime is 121430031413. The next prime is 121430031461. The reversal of 121430031431 is 134130034121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134130034121 = 919 ⋅145952159.

It is a cyclic number.

It is not a de Polignac number, because 121430031431 - 2¹⁸ = 121429769287 is a prime.

It is a super-2 number, since 2×121430031431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121430031397 and 121430031406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121430031461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183428720 + ... + 183429381.

It is an arithmetic number, because the mean of its divisors is an integer number (30449222466).

Almost surely, 2^121430031431 is an apocalyptic number.

121430031431 is a deficient number, since it is larger than the sum of its proper divisors (366858433).

121430031431 is an equidigital number, since it uses as much as digits as its factorization.

121430031431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366858432.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 121430031431 its reverse (134130034121), we get a palindrome (255560065552).

The spelling of 121430031431 in words is "one hundred twenty-one billion, four hundred thirty million, thirty-one thousand, four hundred thirty-one".