2101212021079 has 2 divisors, whose sum is σ = 2101212021080. Its totient is φ = 2101212021078.

The previous prime is 2101212021059. The next prime is 2101212021107. The reversal of 2101212021079 is 9701202121012.

It is an a-pointer prime, because the next prime (2101212021107) can be obtained adding 2101212021079 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101212021079 - 2²³ = 2101203632471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101212021059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050606010539 + 1050606010540.

It is an arithmetic number, because the mean of its divisors is an integer number (1050606010540).

Almost surely, 2^{2101212021079} is an apocalyptic number.

2101212021079 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101212021079 is an equidigital number, since it uses as much as digits as its factorization.

2101212021079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The spelling of 2101212021079 in words is "two trillion, one hundred one billion, two hundred twelve million, twenty-one thousand, seventy-nine".