791001011101021 has 16 divisors (see below), whose sum is σ = 928523491056000. Its totient is φ = 659612662597440.

The previous prime is 791001011101003. The next prime is 791001011101039. The reversal of 791001011101021 is 120101110100197.

It is an interprime number because it is at equal distance from previous prime (791001011101003) and next prime (791001011101039).

It is a cyclic number.

It is not a de Polignac number, because 791001011101021 - 2²¹ = 791001009003869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791001011201021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145134646 + ... + 150486103.

It is an arithmetic number, because the mean of its divisors is an integer number (58032718191000).

Almost surely, 2^{791001011101021} is an apocalyptic number.

It is an amenable number.

791001011101021 is a deficient number, since it is larger than the sum of its proper divisors (137522479954979).

791001011101021 is a wasteful number, since it uses less digits than its factorization.

791001011101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295631124.

The product of its (nonzero) digits is 126, while the sum is 25.

The spelling of 791001011101021 in words is "seven hundred ninety-one trillion, one billion, eleven million, one hundred one thousand, twenty-one".