100020121201999 has 4 divisors (see below), whose sum is σ = 100021561923064. Its totient is φ = 100018680480936.

The previous prime is 100020121201993. The next prime is 100020121202051. The reversal of 100020121201999 is 999102121020001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100020121201999 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 (100020121201993) 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, 720256392 + ... + 720395245.

It is an arithmetic number, because the mean of its divisors is an integer number (25005390480766).

Almost surely, 2^{100020121201999} is an apocalyptic number.

100020121201999 is a deficient number, since it is larger than the sum of its proper divisors (1440721065).

100020121201999 is an equidigital number, since it uses as much as digits as its factorization.

100020121201999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440721064.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 100020121201999 in words is "one hundred trillion, twenty billion, one hundred twenty-one million, two hundred one thousand, nine hundred ninety-nine".