21222131102 has 4 divisors (see below), whose sum is σ = 31833196656. Its totient is φ = 10611065550.

The previous prime is 21222131089. The next prime is 21222131153. The reversal of 21222131102 is 20113122212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305532774 + ... + 5305532777.

It is an arithmetic number, because the mean of its divisors is an integer number (7958299164).

Almost surely, 2^21222131102 is an apocalyptic number.

21222131102 is a deficient number, since it is larger than the sum of its proper divisors (10611065554).

21222131102 is a wasteful number, since it uses less digits than its factorization.

21222131102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10611065553.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21222131102 its reverse (20113122212), we get a palindrome (41335253314).

The spelling of 21222131102 in words is "twenty-one billion, two hundred twenty-two million, one hundred thirty-one thousand, one hundred two".