21110002121001 has 8 divisors (see below), whose sum is σ = 28608090306304. Its totient is φ = 13842624341520.

The previous prime is 21110002120981. The next prime is 21110002121023. The reversal of 21110002121001 is 10012120001112.

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

It is not a de Polignac number, because 21110002121001 - 2²² = 21109997926697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110002121801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57677601241 + ... + 57677601606.

It is an arithmetic number, because the mean of its divisors is an integer number (3576011288288).

Almost surely, 2^{21110002121001} is an apocalyptic number.

It is an amenable number.

21110002121001 is a deficient number, since it is larger than the sum of its proper divisors (7498088185303).

21110002121001 is a wasteful number, since it uses less digits than its factorization.

21110002121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115355202911.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21110002121001 its reverse (10012120001112), we get a palindrome (31122122122113).

The spelling of 21110002121001 in words is "twenty-one trillion, one hundred ten billion, two million, one hundred twenty-one thousand, one".