21221110103099 has 4 divisors (see below), whose sum is σ = 21672623084064. Its totient is φ = 20769597122136.

The previous prime is 21221110103077. The next prime is 21221110103101. The reversal of 21221110103099 is 99030101112212.

It is a happy number.

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-21221110103099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221110102099) 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, 225756490412 + ... + 225756490505.

It is an arithmetic number, because the mean of its divisors is an integer number (5418155771016).

Almost surely, 2^{21221110103099} is an apocalyptic number.

21221110103099 is a deficient number, since it is larger than the sum of its proper divisors (451512980965).

21221110103099 is an equidigital number, since it uses as much as digits as its factorization.

21221110103099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451512980964.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 21221110103099 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred ten million, one hundred three thousand, ninety-nine".