100111021012121 has 4 divisors (see below), whose sum is σ = 114412595442432. Its totient is φ = 85809446581812.

The previous prime is 100111021012091. The next prime is 100111021012129. The reversal of 100111021012121 is 121210120111001.

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 a de Polignac number, because none of the positive numbers 2^k-100111021012121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100111021012096 and 100111021012105.

It is not an unprimeable number, because it can be changed into a prime (100111021012129) 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, 7150787215145 + ... + 7150787215158.

It is an arithmetic number, because the mean of its divisors is an integer number (28603148860608).

Almost surely, 2^{100111021012121} is an apocalyptic number.

It is an amenable number.

100111021012121 is a deficient number, since it is larger than the sum of its proper divisors (14301574430311).

100111021012121 is an equidigital number, since it uses as much as digits as its factorization.

100111021012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14301574430310.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 100111021012121 its reverse (121210120111001), we get a palindrome (221321141123122).

The spelling of 100111021012121 in words is "one hundred trillion, one hundred eleven billion, twenty-one million, twelve thousand, one hundred twenty-one".