100100020021121 has 4 divisors (see below), whose sum is σ = 104452194804672. Its totient is φ = 95747845237572.

The previous prime is 100100020021103. The next prime is 100100020021223. The reversal of 100100020021121 is 121120020001001.

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 100100020021121 - 2¹⁰ = 100100020020097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100100020021621) 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, 2176087391741 + ... + 2176087391786.

It is an arithmetic number, because the mean of its divisors is an integer number (26113048701168).

Almost surely, 2^{100100020021121} is an apocalyptic number.

It is an amenable number.

100100020021121 is a deficient number, since it is larger than the sum of its proper divisors (4352174783551).

100100020021121 is an equidigital number, since it uses as much as digits as its factorization.

100100020021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4352174783550.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100100020021121 its reverse (121120020001001), we get a palindrome (221220040022122).

The spelling of 100100020021121 in words is "one hundred trillion, one hundred billion, twenty million, twenty-one thousand, one hundred twenty-one".