2121121212293 has 2 divisors, whose sum is σ = 2121121212294. Its totient is φ = 2121121212292.

The previous prime is 2121121212281. The next prime is 2121121212307. The reversal of 2121121212293 is 3922121211212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1947383967169 + 173737245124 = 1395487^2 + 416818^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121121212293 - 2⁴ = 2121121212277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121121212193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060560606146 + 1060560606147.

It is an arithmetic number, because the mean of its divisors is an integer number (1060560606147).

Almost surely, 2^{2121121212293} is an apocalyptic number.

It is an amenable number.

2121121212293 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121121212293 is an equidigital number, since it uses as much as digits as its factorization.

2121121212293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The spelling of 2121121212293 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred ninety-three".