101021221079 has 2 divisors, whose sum is σ = 101021221080. Its totient is φ = 101021221078.

The previous prime is 101021221057. The next prime is 101021221117. The reversal of 101021221079 is 970122120101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101021221079 - 2⁸ = 101021220823 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101021221019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50510610539 + 50510610540.

It is an arithmetic number, because the mean of its divisors is an integer number (50510610540).

Almost surely, 2^101021221079 is an apocalyptic number.

101021221079 is a deficient number, since it is larger than the sum of its proper divisors (1).

101021221079 is an equidigital number, since it uses as much as digits as its factorization.

101021221079 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 26.

The spelling of 101021221079 in words is "one hundred one billion, twenty-one million, two hundred twenty-one thousand, seventy-nine".