21112222220102 has 16 divisors (see below), whose sum is σ = 34151270086752. Its totient is φ = 9730699387200.

The previous prime is 21112222220093. The next prime is 21112222220113. The reversal of 21112222220102 is 20102222221112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558446399 + ... + 558484202.

It is an arithmetic number, because the mean of its divisors is an integer number (2134454380422).

Almost surely, 2^{21112222220102} is an apocalyptic number.

21112222220102 is a deficient number, since it is larger than the sum of its proper divisors (13039047866650).

21112222220102 is a wasteful number, since it uses less digits than its factorization.

21112222220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116931343.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21112222220102 its reverse (20102222221112), we get a palindrome (41214444441214).

The spelling of 21112222220102 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, two hundred twenty thousand, one hundred two".