20021011220111 has 8 divisors (see below), whose sum is σ = 21842146981200. Its totient is φ = 18200049431040.

The previous prime is 20021011220087. The next prime is 20021011220113. The reversal of 20021011220111 is 11102211012002.

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 20021011220111 - 2³⁸ = 19746133313167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021011220113) 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, 43252316 + ... + 43712753.

It is an arithmetic number, because the mean of its divisors is an integer number (2730268372650).

Almost surely, 2^{20021011220111} is an apocalyptic number.

20021011220111 is a deficient number, since it is larger than the sum of its proper divisors (1821135761089).

20021011220111 is a wasteful number, since it uses less digits than its factorization.

20021011220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86986009.

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

Adding to 20021011220111 its reverse (11102211012002), we get a palindrome (31123222232113).

The spelling of 20021011220111 in words is "twenty trillion, twenty-one billion, eleven million, two hundred twenty thousand, one hundred eleven".