100121001221111 has 4 divisors (see below), whose sum is σ = 107822616699672. Its totient is φ = 92419385742552.

The previous prime is 100121001221089. The next prime is 100121001221117. The reversal of 100121001221111 is 111122100121001.

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-100121001221111 is a prime.

It is a super-2 number, since 2×100121001221111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121001221117) 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, 3850807739261 + ... + 3850807739286.

It is an arithmetic number, because the mean of its divisors is an integer number (26955654174918).

Almost surely, 2^{100121001221111} is an apocalyptic number.

100121001221111 is a deficient number, since it is larger than the sum of its proper divisors (7701615478561).

100121001221111 is an equidigital number, since it uses as much as digits as its factorization.

100121001221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7701615478560.

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

Adding to 100121001221111 its reverse (111122100121001), we get a palindrome (211243101342112).

It can be divided in two parts, 10012100 and 1221111, that added together give a palindrome (11233211).

The spelling of 100121001221111 in words is "one hundred trillion, one hundred twenty-one billion, one million, two hundred twenty-one thousand, one hundred eleven".