21011001102102 has 16 divisors (see below), whose sum is σ = 45842184222912. Its totient is φ = 6366970030920.

The previous prime is 21011001102097. The next prime is 21011001102137. The reversal of 21011001102102 is 20120110011012.

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, 159174250708 + ... + 159174250839.

It is an arithmetic number, because the mean of its divisors is an integer number (2865136513932).

Almost surely, 2^{21011001102102} is an apocalyptic number.

21011001102102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21011001102102 is an abundant number, since it is smaller than the sum of its proper divisors (24831183120810).

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

21011001102102 is a wasteful number, since it uses less digits than its factorization.

21011001102102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318348501563.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21011001102102 its reverse (20120110011012), we get a palindrome (41131111113114).

The spelling of 21011001102102 in words is "twenty-one trillion, eleven billion, one million, one hundred two thousand, one hundred two".