2121011979433 has 2 divisors, whose sum is σ = 2121011979434. Its totient is φ = 2121011979432.

The previous prime is 2121011979409. The next prime is 2121011979547. The reversal of 2121011979433 is 3349791101212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1987287922944 + 133724056489 = 1409712^2 + 365683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121011979433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121011979433.

It is not a weakly prime, because it can be changed into another prime (2121011979833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060505989716 + 1060505989717.

It is an arithmetic number, because the mean of its divisors is an integer number (1060505989717).

Almost surely, 2^{2121011979433} is an apocalyptic number.

It is an amenable number.

2121011979433 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121011979433 is an equidigital number, since it uses as much as digits as its factorization.

2121011979433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 2121011979433 in words is "two trillion, one hundred twenty-one billion, eleven million, nine hundred seventy-nine thousand, four hundred thirty-three".