20111101201021 has 8 divisors (see below), whose sum is σ = 20127549952640. Its totient is φ = 20094655974768.

The previous prime is 20111101200991. The next prime is 20111101201031. The reversal of 20111101201021 is 12010210111102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20111101201021 - 2¹⁵ = 20111101168253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111101200992 and 20111101201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111101201031) 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, 10593715 + ... + 12347023.

It is an arithmetic number, because the mean of its divisors is an integer number (2515943744080).

Almost surely, 2^{20111101201021} is an apocalyptic number.

It is an amenable number.

20111101201021 is a deficient number, since it is larger than the sum of its proper divisors (16448751619).

20111101201021 is a wasteful number, since it uses less digits than its factorization.

20111101201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762683.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20111101201021 its reverse (12010210111102), we get a palindrome (32121311312123).

The spelling of 20111101201021 in words is "twenty trillion, one hundred eleven billion, one hundred one million, two hundred one thousand, twenty-one".