21022100002102 has 4 divisors (see below), whose sum is σ = 31533150003156. Its totient is φ = 10511050001050.

The previous prime is 21022100002093. The next prime is 21022100002121. The reversal of 21022100002102 is 20120000122012.

It is a happy number.

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

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, 5255525000524 + ... + 5255525000527.

It is an arithmetic number, because the mean of its divisors is an integer number (7883287500789).

Almost surely, 2^{21022100002102} is an apocalyptic number.

21022100002102 is a deficient number, since it is larger than the sum of its proper divisors (10511050001054).

21022100002102 is a wasteful number, since it uses less digits than its factorization.

21022100002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10511050001053.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21022100002102 its reverse (20120000122012), we get a palindrome (41142100124114).

The spelling of 21022100002102 in words is "twenty-one trillion, twenty-two billion, one hundred million, two thousand, one hundred two".