211221000293 has 2 divisors, whose sum is σ = 211221000294. Its totient is φ = 211221000292.

The previous prime is 211221000283. The next prime is 211221000311. The reversal of 211221000293 is 392000122112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166935164929 + 44285835364 = 408577^2 + 210442^2 .

It is a cyclic number.

It is not a de Polignac number, because 211221000293 - 2⁸ = 211221000037 is a prime.

It is a super-2 number, since 2×211221000293² (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 (211221000203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610500146 + 105610500147.

It is an arithmetic number, because the mean of its divisors is an integer number (105610500147).

Almost surely, 2^211221000293 is an apocalyptic number.

It is an amenable number.

211221000293 is a deficient number, since it is larger than the sum of its proper divisors (1).

211221000293 is an equidigital number, since it uses as much as digits as its factorization.

211221000293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 211221000293 in words is "two hundred eleven billion, two hundred twenty-one million, two hundred ninety-three", and thus it is an aban number.