121213121212031 has 2 divisors, whose sum is σ = 121213121212032. Its totient is φ = 121213121212030.

The previous prime is 121213121212003. The next prime is 121213121212069. The reversal of 121213121212031 is 130212121312121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121213121212031 is a prime.

It is a super-2 number, since 2×121213121212031² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121213121211988 and 121213121212006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121213121212081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606560606015 + 60606560606016.

It is an arithmetic number, because the mean of its divisors is an integer number (60606560606016).

Almost surely, 2^{121213121212031} is an apocalyptic number.

121213121212031 is a deficient number, since it is larger than the sum of its proper divisors (1).

121213121212031 is an equidigital number, since it uses as much as digits as its factorization.

121213121212031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 121213121212031 its reverse (130212121312121), we get a palindrome (251425242524152).

The spelling of 121213121212031 in words is "one hundred twenty-one trillion, two hundred thirteen billion, one hundred twenty-one million, two hundred twelve thousand, thirty-one".