21120122021001 has 32 divisors (see below), whose sum is σ = 28969903128960. Its totient is φ = 13681110643200.

The previous prime is 21120122020999. The next prime is 21120122021017. The reversal of 21120122021001 is 10012022102112.

It is not a de Polignac number, because 21120122021001 - 2¹ = 21120122020999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120122020001) 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 31 ways as a sum of consecutive naturals, for example, 17208486 + ... + 18394896.

It is an arithmetic number, because the mean of its divisors is an integer number (905309472780).

Almost surely, 2^{21120122021001} is an apocalyptic number.

It is an amenable number.

21120122021001 is a deficient number, since it is larger than the sum of its proper divisors (7849781107959).

21120122021001 is a wasteful number, since it uses less digits than its factorization.

21120122021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187657.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21120122021001 its reverse (10012022102112), we get a palindrome (31132144123113).

The spelling of 21120122021001 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty-two million, twenty-one thousand, one".