211212321293 has 2 divisors, whose sum is σ = 211212321294. Its totient is φ = 211212321292.

The previous prime is 211212321253. The next prime is 211212321323. The reversal of 211212321293 is 392123212112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135602170564 + 75610150729 = 368242^2 + 274973^2 .

It is a cyclic number.

It is not a de Polignac number, because 211212321293 - 2²⁶ = 211145212429 is a prime.

It is a super-2 number, since 2×211212321293² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211212321233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606160646 + 105606160647.

It is an arithmetic number, because the mean of its divisors is an integer number (105606160647).

Almost surely, 2^211212321293 is an apocalyptic number.

It is an amenable number.

211212321293 is a deficient number, since it is larger than the sum of its proper divisors (1).

211212321293 is an equidigital number, since it uses as much as digits as its factorization.

211212321293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The spelling of 211212321293 in words is "two hundred eleven billion, two hundred twelve million, three hundred twenty-one thousand, two hundred ninety-three".