21221101202102 has 8 divisors (see below), whose sum is σ = 31837312793136. Its totient is φ = 10608663604392.

The previous prime is 21221101202089. The next prime is 21221101202219. The reversal of 21221101202102 is 20120210112212.

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, 943484273 + ... + 943506764.

It is an arithmetic number, because the mean of its divisors is an integer number (3979664099142).

Almost surely, 2^{21221101202102} is an apocalyptic number.

21221101202102 is a deficient number, since it is larger than the sum of its proper divisors (10616211591034).

21221101202102 is a wasteful number, since it uses less digits than its factorization.

21221101202102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886996662.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221101202102 its reverse (20120210112212), we get a palindrome (41341311314314).

The spelling of 21221101202102 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred one million, two hundred two thousand, one hundred two".