100111221022021 has 4 divisors (see below), whose sum is σ = 109212241114944. Its totient is φ = 91010200929100.

The previous prime is 100111221022009. The next prime is 100111221022061. The reversal of 100111221022021 is 120220122111001.

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 100111221022021 - 2⁵ = 100111221021989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100111221021986 and 100111221022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111221022061) 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, 4550510046445 + ... + 4550510046466.

It is an arithmetic number, because the mean of its divisors is an integer number (27303060278736).

Almost surely, 2^{100111221022021} is an apocalyptic number.

100111221022021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100111221022021 is a deficient number, since it is larger than the sum of its proper divisors (9101020092923).

100111221022021 is an equidigital number, since it uses as much as digits as its factorization.

100111221022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9101020092922.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 100111221022021 its reverse (120220122111001), we get a palindrome (220331343133022).

The spelling of 100111221022021 in words is "one hundred trillion, one hundred eleven billion, two hundred twenty-one million, twenty-two thousand, twenty-one".