21220222012102 has 4 divisors (see below), whose sum is σ = 31830333018156. Its totient is φ = 10610111006050.

The previous prime is 21220222012039. The next prime is 21220222012111. The reversal of 21220222012102 is 20121022202212.

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

It is a super-3 number, since 3×21220222012102³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21220222012102.

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, 5305055503024 + ... + 5305055503027.

It is an arithmetic number, because the mean of its divisors is an integer number (7957583254539).

Almost surely, 2^{21220222012102} is an apocalyptic number.

21220222012102 is a deficient number, since it is larger than the sum of its proper divisors (10610111006054).

21220222012102 is a wasteful number, since it uses less digits than its factorization.

21220222012102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10610111006053.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21220222012102 its reverse (20121022202212), we get a palindrome (41341244214314).

The spelling of 21220222012102 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, twelve thousand, one hundred two".