21101011110102 has 48 divisors (see below), whose sum is σ = 53555070877632. Its totient is φ = 5480782105680.

The previous prime is 21101011110061. The next prime is 21101011110107. The reversal of 21101011110102 is 20101111010112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101011110107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3262367068 + ... + 3262373535.

It is an arithmetic number, because the mean of its divisors is an integer number (1115730643284).

Almost surely, 2^{21101011110102} is an apocalyptic number.

21101011110102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21101011110102 is an abundant number, since it is smaller than the sum of its proper divisors (32454059767530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21101011110102 is a wasteful number, since it uses less digits than its factorization.

21101011110102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6524740633 (or 6524740626 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21101011110102 its reverse (20101111010112), we get a palindrome (41202122120214).

The spelling of 21101011110102 in words is "twenty-one trillion, one hundred one billion, eleven million, one hundred ten thousand, one hundred two".