2121012021259 has 2 divisors, whose sum is σ = 2121012021260. Its totient is φ = 2121012021258.

The previous prime is 2121012021209. The next prime is 2121012021299. The reversal of 2121012021259 is 9521202101212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121012021259 - 2³¹ = 2118864537611 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121012021209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060506010629 + 1060506010630.

It is an arithmetic number, because the mean of its divisors is an integer number (1060506010630).

Almost surely, 2^{2121012021259} is an apocalyptic number.

2121012021259 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121012021259 is an equidigital number, since it uses as much as digits as its factorization.

2121012021259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 2121012021259 in words is "two trillion, one hundred twenty-one billion, twelve million, twenty-one thousand, two hundred fifty-nine".