21210102100102 has 12 divisors (see below), whose sum is σ = 32950057545756. Its totient is φ = 10239359633720.

The previous prime is 21210102100093. The next prime is 21210102100133. The reversal of 21210102100102 is 20100120101212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6305022724 + ... + 6305026087.

It is an arithmetic number, because the mean of its divisors is an integer number (2745838128813).

Almost surely, 2^{21210102100102} is an apocalyptic number.

21210102100102 is a deficient number, since it is larger than the sum of its proper divisors (11739955445654).

21210102100102 is a wasteful number, since it uses less digits than its factorization.

21210102100102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12610048871 (or 12610048842 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21210102100102 its reverse (20100120101212), we get a palindrome (41310222201314).

The spelling of 21210102100102 in words is "twenty-one trillion, two hundred ten billion, one hundred two million, one hundred thousand, one hundred two".