21110022121001 has 16 divisors (see below), whose sum is σ = 23131078891200. Its totient is φ = 19105963087680.

The previous prime is 21110022120937. The next prime is 21110022121031. The reversal of 21110022121001 is 10012122001112.

It is a cyclic number.

It is not a de Polignac number, because 21110022121001 - 2⁶ = 21110022120937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110022121031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186511775 + ... + 186624923.

It is an arithmetic number, because the mean of its divisors is an integer number (1445692430700).

Almost surely, 2^{21110022121001} is an apocalyptic number.

It is an amenable number.

21110022121001 is a deficient number, since it is larger than the sum of its proper divisors (2021056770199).

21110022121001 is a wasteful number, since it uses less digits than its factorization.

21110022121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188104.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21110022121001 its reverse (10012122001112), we get a palindrome (31122144122113).

The spelling of 21110022121001 in words is "twenty-one trillion, one hundred ten billion, twenty-two million, one hundred twenty-one thousand, one".