2221210110021 has 16 divisors (see below), whose sum is σ = 3386369347200. Its totient is φ = 1268637334848.

The previous prime is 2221210110013. The next prime is 2221210110071. The reversal of 2221210110021 is 1200110121222.

It is not a de Polignac number, because 2221210110021 - 2³ = 2221210110013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221210110071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26022426 + ... + 26107643.

It is an arithmetic number, because the mean of its divisors is an integer number (211648084200).

Almost surely, 2^{2221210110021} is an apocalyptic number.

2221210110021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2221210110021 is a deficient number, since it is larger than the sum of its proper divisors (1165159237179).

2221210110021 is a wasteful number, since it uses less digits than its factorization.

2221210110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52132108.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2221210110021 its reverse (1200110121222), we get a palindrome (3421320231243).

The spelling of 2221210110021 in words is "two trillion, two hundred twenty-one billion, two hundred ten million, one hundred ten thousand, twenty-one".