20110200122221 has 4 divisors (see below), whose sum is σ = 21938400133344. Its totient is φ = 18282000111100.

The previous prime is 20110200122197. The next prime is 20110200122249. The reversal of 20110200122221 is 12222100201102.

It is a happy number.

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 not a de Polignac number, because 20110200122221 - 2⁵ = 20110200122189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110200122195 and 20110200122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110200122281) 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, 914100005545 + ... + 914100005566.

It is an arithmetic number, because the mean of its divisors is an integer number (5484600033336).

Almost surely, 2^{20110200122221} is an apocalyptic number.

It is an amenable number.

20110200122221 is a deficient number, since it is larger than the sum of its proper divisors (1828200011123).

20110200122221 is a wasteful number, since it uses less digits than its factorization.

20110200122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828200011122.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20110200122221 its reverse (12222100201102), we get a palindrome (32332300323323).

The spelling of 20110200122221 in words is "twenty trillion, one hundred ten billion, two hundred million, one hundred twenty-two thousand, two hundred twenty-one".