21002100111022 has 8 divisors (see below), whose sum is σ = 31679145419400. Its totient is φ = 10442384971224.

The previous prime is 21002100110993. The next prime is 21002100111023. The reversal of 21002100111022 is 22011100120012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21002100110993 and 21002100111011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002100111023) 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, 29332541697 + ... + 29332542412.

It is an arithmetic number, because the mean of its divisors is an integer number (3959893177425).

Almost surely, 2^{21002100111022} is an apocalyptic number.

21002100111022 is a deficient number, since it is larger than the sum of its proper divisors (10677045308378).

21002100111022 is a wasteful number, since it uses less digits than its factorization.

21002100111022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58665084290.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21002100111022 its reverse (22011100120012), we get a palindrome (43013200231034).

The spelling of 21002100111022 in words is "twenty-one trillion, two billion, one hundred million, one hundred eleven thousand, twenty-two".