1021021200079 has 2 divisors, whose sum is σ = 1021021200080. Its totient is φ = 1021021200078.

The previous prime is 1021021200077. The next prime is 1021021200083. The reversal of 1021021200079 is 9700021201201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021021200079 - 2¹ = 1021021200077 is a prime.

It is a super-2 number, since 2×1021021200079² (a number of 25 digits) contains 22 as substring.

Together with 1021021200077, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021021200077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510510600039 + 510510600040.

It is an arithmetic number, because the mean of its divisors is an integer number (510510600040).

Almost surely, 2^{1021021200079} is an apocalyptic number.

1021021200079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021021200079 is an equidigital number, since it uses as much as digits as its factorization.

1021021200079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 1021021200079 in words is "one trillion, twenty-one billion, twenty-one million, two hundred thousand, seventy-nine".