21101101120102 has 4 divisors (see below), whose sum is σ = 31651651680156. Its totient is φ = 10550550560050.

The previous prime is 21101101120087. The next prime is 21101101120163. The reversal of 21101101120102 is 20102110110112.

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, 5275275280024 + ... + 5275275280027.

It is an arithmetic number, because the mean of its divisors is an integer number (7912912920039).

Almost surely, 2^{21101101120102} is an apocalyptic number.

21101101120102 is a deficient number, since it is larger than the sum of its proper divisors (10550550560054).

21101101120102 is a wasteful number, since it uses less digits than its factorization.

21101101120102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10550550560053.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21101101120102 its reverse (20102110110112), we get a palindrome (41203211230214).

The spelling of 21101101120102 in words is "twenty-one trillion, one hundred one billion, one hundred one million, one hundred twenty thousand, one hundred two".