2121954101359 has 2 divisors, whose sum is σ = 2121954101360. Its totient is φ = 2121954101358.

The previous prime is 2121954101329. The next prime is 2121954101363. The reversal of 2121954101359 is 9531014591212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121954101359 - 2⁷ = 2121954101231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121954101329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060977050679 + 1060977050680.

It is an arithmetic number, because the mean of its divisors is an integer number (1060977050680).

Almost surely, 2^{2121954101359} is an apocalyptic number.

2121954101359 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121954101359 is an equidigital number, since it uses as much as digits as its factorization.

2121954101359 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 43.

The spelling of 2121954101359 in words is "two trillion, one hundred twenty-one billion, nine hundred fifty-four million, one hundred one thousand, three hundred fifty-nine".