20010122120999 has 4 divisors (see below), whose sum is σ = 20074052223936. Its totient is φ = 19946192018064.

The previous prime is 20010122120977. The next prime is 20010122121013. The reversal of 20010122120999 is 99902122101002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20010122120999 - 2⁸ = 20010122120743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010122128999) 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, 31965050999 + ... + 31965051624.

It is an arithmetic number, because the mean of its divisors is an integer number (5018513055984).

Almost surely, 2^{20010122120999} is an apocalyptic number.

20010122120999 is a deficient number, since it is larger than the sum of its proper divisors (63930102937).

20010122120999 is an equidigital number, since it uses as much as digits as its factorization.

20010122120999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63930102936.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 20010122120999 in words is "twenty trillion, ten billion, one hundred twenty-two million, one hundred twenty thousand, nine hundred ninety-nine".