21101020220102 has 16 divisors (see below), whose sum is σ = 31737005118000. Its totient is φ = 10522025537760.

The previous prime is 21101020220087. The next prime is 21101020220117. The reversal of 21101020220102 is 20102202010112.

It is an interprime number because it is at equal distance from previous prime (21101020220087) and next prime (21101020220117).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4270649 + ... + 7774347.

It is an arithmetic number, because the mean of its divisors is an integer number (1983562819875).

Almost surely, 2^{21101020220102} is an apocalyptic number.

21101020220102 is a deficient number, since it is larger than the sum of its proper divisors (10635984897898).

21101020220102 is a wasteful number, since it uses less digits than its factorization.

21101020220102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511831.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21101020220102 its reverse (20102202010112), we get a palindrome (41203222230214).

The spelling of 21101020220102 in words is "twenty-one trillion, one hundred one billion, twenty million, two hundred twenty thousand, one hundred two".