121211214312031 has 4 divisors (see below), whose sum is σ = 124030079761192. Its totient is φ = 118392348862872.

The previous prime is 121211214311987. The next prime is 121211214312079. The reversal of 121211214312031 is 130213412112121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121211214312031 - 2¹⁵ = 121211214279263 is a prime.

It is a super-2 number, since 2×121211214312031² (a number of 29 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 = 121211214311987 and 121211214312005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211214312131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409432724516 + ... + 1409432724601.

It is an arithmetic number, because the mean of its divisors is an integer number (31007519940298).

Almost surely, 2^{121211214312031} is an apocalyptic number.

121211214312031 is a deficient number, since it is larger than the sum of its proper divisors (2818865449161).

121211214312031 is an equidigital number, since it uses as much as digits as its factorization.

121211214312031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818865449160.

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 121211214312031 its reverse (130213412112121), we get a palindrome (251424626424152).

The spelling of 121211214312031 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred fourteen million, three hundred twelve thousand, thirty-one".