21220101111102 has 32 divisors (see below), whose sum is σ = 44600891356032. Its totient is φ = 6722143906464.

The previous prime is 21220101111071. The next prime is 21220101111103. The reversal of 21220101111102 is 20111110102212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220101111103) 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, 1111456048 + ... + 1111475139.

It is an arithmetic number, because the mean of its divisors is an integer number (1393777854876).

Almost surely, 2^{21220101111102} is an apocalyptic number.

21220101111102 is an abundant number, since it is smaller than the sum of its proper divisors (23380790244930).

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

21220101111102 is a wasteful number, since it uses less digits than its factorization.

21220101111102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222931272.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21220101111102 its reverse (20111110102212), we get a palindrome (41331211213314).

The spelling of 21220101111102 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, one hundred eleven thousand, one hundred two".