20111100012021 has 8 divisors (see below), whose sum is σ = 26814877810560. Its totient is φ = 13407361110752.

The previous prime is 20111100012013. The next prime is 20111100012187. The reversal of 20111100012021 is 12021000111102.

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 20111100012021 - 2³ = 20111100012013 is a prime.

It is a super-2 number, since 2×20111100012021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20111100011988 and 20111100012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111100012001) 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, 8495736 + ... + 10601873.

It is an arithmetic number, because the mean of its divisors is an integer number (3351859726320).

Almost surely, 2^{20111100012021} is an apocalyptic number.

It is an amenable number.

20111100012021 is a deficient number, since it is larger than the sum of its proper divisors (6703777798539).

20111100012021 is a wasteful number, since it uses less digits than its factorization.

20111100012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19448635.

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

Adding to 20111100012021 its reverse (12021000111102), we get a palindrome (32132100123123).

The spelling of 20111100012021 in words is "twenty trillion, one hundred eleven billion, one hundred million, twelve thousand, twenty-one".