21221122102 has 8 divisors (see below), whose sum is σ = 31836119112. Its totient is φ = 10609082400.

The previous prime is 21221122093. The next prime is 21221122147. The reversal of 21221122102 is 20122112212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721299 + ... + 750142.

It is an arithmetic number, because the mean of its divisors is an integer number (3979514889).

Almost surely, 2^21221122102 is an apocalyptic number.

21221122102 is a deficient number, since it is larger than the sum of its proper divisors (10614997010).

21221122102 is a wasteful number, since it uses less digits than its factorization.

21221122102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478654.

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

Adding to 21221122102 its reverse (20122112212), we get a palindrome (41343234314).

It can be divided in two parts, 2122112210 and 2, that added together give a palindrome (2122112212).

The spelling of 21221122102 in words is "twenty-one billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred two".