21122312213293 has 2 divisors, whose sum is σ = 21122312213294. Its totient is φ = 21122312213292.

The previous prime is 21122312213267. The next prime is 21122312213323. The reversal of 21122312213293 is 39231221322112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15658695809449 + 5463616403844 = 3957107^2 + 2337438^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122312213293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21122312213263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561156106646 + 10561156106647.

It is an arithmetic number, because the mean of its divisors is an integer number (10561156106647).

Almost surely, 2^{21122312213293} is an apocalyptic number.

It is an amenable number.

21122312213293 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122312213293 is an equidigital number, since it uses as much as digits as its factorization.

21122312213293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The spelling of 21122312213293 in words is "twenty-one trillion, one hundred twenty-two billion, three hundred twelve million, two hundred thirteen thousand, two hundred ninety-three".