2221100001012 has 96 divisors (see below), whose sum is σ = 5509263247488. Its totient is φ = 694044278784.

The previous prime is 2221100000993. The next prime is 2221100001031. The reversal of 2221100001012 is 2101000011222.

It is an interprime number because it is at equal distance from previous prime (2221100000993) and next prime (2221100001031).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 204384003 + ... + 204394869.

It is an arithmetic number, because the mean of its divisors is an integer number (57388158828).

Almost surely, 2^{2221100001012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221100001012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2754631623744).

2221100001012 is an abundant number, since it is smaller than the sum of its proper divisors (3288163246476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221100001012 is a wasteful number, since it uses less digits than its factorization.

2221100001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14785 (or 14783 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2221100001012 its reverse (2101000011222), we get a palindrome (4322100012234).

The spelling of 2221100001012 in words is "two trillion, two hundred twenty-one billion, one hundred million, one thousand, twelve".