312121020121223 has 2 divisors, whose sum is σ = 312121020121224. Its totient is φ = 312121020121222.

The previous prime is 312121020121201. The next prime is 312121020121231. The reversal of 312121020121223 is 322121020121213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312121020121223 - 2²⁰ = 312121019072647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312121020123223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156060510060611 + 156060510060612.

It is an arithmetic number, because the mean of its divisors is an integer number (156060510060612).

Almost surely, 2^{312121020121223} is an apocalyptic number.

312121020121223 is a deficient number, since it is larger than the sum of its proper divisors (1).

312121020121223 is an equidigital number, since it uses as much as digits as its factorization.

312121020121223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 312121020121223 its reverse (322121020121213), we get a palindrome (634242040242436).

The spelling of 312121020121223 in words is "three hundred twelve trillion, one hundred twenty-one billion, twenty million, one hundred twenty-one thousand, two hundred twenty-three".