221020000011101 has 4 divisors (see below), whose sum is σ = 221069970623712. Its totient is φ = 220970029398492.

The previous prime is 221020000011047. The next prime is 221020000011113. The reversal of 221020000011101 is 101110000020122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221020000011101 - 2³⁰ = 221018926269277 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 (221020000013101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24985299671 + ... + 24985308516.

It is an arithmetic number, because the mean of its divisors is an integer number (55267492655928).

Almost surely, 2^{221020000011101} is an apocalyptic number.

It is an amenable number.

221020000011101 is a deficient number, since it is larger than the sum of its proper divisors (49970612611).

221020000011101 is an equidigital number, since it uses as much as digits as its factorization.

221020000011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49970612610.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221020000011101 its reverse (101110000020122), we get a palindrome (322130000031223).

The spelling of 221020000011101 in words is "two hundred twenty-one trillion, twenty billion, eleven thousand, one hundred one".