2221102122100 has 36 divisors (see below), whose sum is σ = 4834996063884. Its totient is φ = 885638183680.

The previous prime is 2221102122067. The next prime is 2221102122103. The reversal of 2221102122100 is 12212011222.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 492076996324 + 1729025125776 = 701482^2 + 1314924^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221102122103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35001457 + ... + 35064856.

It is an arithmetic number, because the mean of its divisors is an integer number (134305446219).

Almost surely, 2^{2221102122100} is an apocalyptic number.

2221102122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221102122100 is an abundant number, since it is smaller than the sum of its proper divisors (2613893941784).

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

2221102122100 is a wasteful number, since it uses less digits than its factorization.

2221102122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70066644 (or 70066637 counting only the distinct ones).

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

Adding to 2221102122100 its reverse (12212011222), we get a palindrome (2233314133322).

The spelling of 2221102122100 in words is "two trillion, two hundred twenty-one billion, one hundred two million, one hundred twenty-two thousand, one hundred".