105101220720721 has 4 divisors (see below), whose sum is σ = 105101780698944. Its totient is φ = 105100660742500.

The previous prime is 105101220720583. The next prime is 105101220720791. The reversal of 105101220720721 is 127027022101501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 105101220720721 - 2¹³ = 105101220712529 is a prime.

It is a super-2 number, since 2×105101220720721² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105101220720791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279707485 + ... + 280082986.

It is an arithmetic number, because the mean of its divisors is an integer number (26275445174736).

Almost surely, 2^{105101220720721} is an apocalyptic number.

It is an amenable number.

105101220720721 is a deficient number, since it is larger than the sum of its proper divisors (559978223).

105101220720721 is an equidigital number, since it uses as much as digits as its factorization.

105101220720721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559978222.

The product of its (nonzero) digits is 3920, while the sum is 31.

The spelling of 105101220720721 in words is "one hundred five trillion, one hundred one billion, two hundred twenty million, seven hundred twenty thousand, seven hundred twenty-one".