21202102120102 has 8 divisors (see below), whose sum is σ = 32160491980200. Its totient is φ = 10481938126704.

The previous prime is 21202102120099. The next prime is 21202102120117. The reversal of 21202102120102 is 20102120120212.

It is a happy number.

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

It is a super-2 number, since 2×21202102120102² (a number of 27 digits) contains 22 as substring.

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, 59556466452 + ... + 59556466807.

It is an arithmetic number, because the mean of its divisors is an integer number (4020061497525).

Almost surely, 2^{21202102120102} is an apocalyptic number.

21202102120102 is a deficient number, since it is larger than the sum of its proper divisors (10958389860098).

21202102120102 is a wasteful number, since it uses less digits than its factorization.

21202102120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119112933350.

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

Adding to 21202102120102 its reverse (20102120120212), we get a palindrome (41304222240314).

The spelling of 21202102120102 in words is "twenty-one trillion, two hundred two billion, one hundred two million, one hundred twenty thousand, one hundred two".