21211121102 has 8 divisors (see below), whose sum is σ = 33688251216. Its totient is φ = 9981704032.

The previous prime is 21211121089. The next prime is 21211121137. The reversal of 21211121102 is 20112111212.

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, 311928218 + ... + 311928285.

It is an arithmetic number, because the mean of its divisors is an integer number (4211031402).

Almost surely, 2^21211121102 is an apocalyptic number.

21211121102 is a deficient number, since it is larger than the sum of its proper divisors (12477130114).

21211121102 is a wasteful number, since it uses less digits than its factorization.

21211121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623856522.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21211121102 its reverse (20112111212), we get a palindrome (41323232314).

The spelling of 21211121102 in words is "twenty-one billion, two hundred eleven million, one hundred twenty-one thousand, one hundred two".