21102001002122 has 8 divisors (see below), whose sum is σ = 32326469620416. Its totient is φ = 10326511128652.

The previous prime is 21102001002109. The next prime is 21102001002127. The reversal of 21102001002122 is 22120010020112.

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 = 21102001002097 and 21102001002106.

It is not an unprimeable number, because it can be changed into a prime (21102001002127) 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, 112244686088 + ... + 112244686275.

It is an arithmetic number, because the mean of its divisors is an integer number (4040808702552).

Almost surely, 2^{21102001002122} is an apocalyptic number.

21102001002122 is a deficient number, since it is larger than the sum of its proper divisors (11224468618294).

21102001002122 is a wasteful number, since it uses less digits than its factorization.

21102001002122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224489372412.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21102001002122 its reverse (22120010020112), we get a palindrome (43222011022234).

The spelling of 21102001002122 in words is "twenty-one trillion, one hundred two billion, one million, two thousand, one hundred twenty-two".