20112001201021 has 32 divisors (see below), whose sum is σ = 21727512576000. Its totient is φ = 18561998547840.

The previous prime is 20112001201003. The next prime is 20112001201079. The reversal of 20112001201021 is 12010210021102.

It is a cyclic number.

It is not a de Polignac number, because 20112001201021 - 2¹⁵ = 20112001168253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112001200992 and 20112001201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112001201321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 338561880 + ... + 338621278.

It is an arithmetic number, because the mean of its divisors is an integer number (678984768000).

Almost surely, 2^{20112001201021} is an apocalyptic number.

It is an amenable number.

20112001201021 is a deficient number, since it is larger than the sum of its proper divisors (1615511374979).

20112001201021 is a wasteful number, since it uses less digits than its factorization.

20112001201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60849.

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

Adding to 20112001201021 its reverse (12010210021102), we get a palindrome (32122211222123).

The spelling of 20112001201021 in words is "twenty trillion, one hundred twelve billion, one million, two hundred one thousand, twenty-one".