21101210111102 has 16 divisors (see below), whose sum is σ = 36030524775552. Its totient is φ = 9174439178520.

The previous prime is 21101210111101. The next prime is 21101210111129. The reversal of 21101210111102 is 20111101210112.

It is a super-2 number, since 2×21101210111102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101210111101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20850997628 + ... + 20850998639.

It is an arithmetic number, because the mean of its divisors is an integer number (2251907798472).

Almost surely, 2^{21101210111102} is an apocalyptic number.

21101210111102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21101210111102 is a deficient number, since it is larger than the sum of its proper divisors (14929314664450).

21101210111102 is a wasteful number, since it uses less digits than its factorization.

21101210111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41701996303.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21101210111102 its reverse (20111101210112), we get a palindrome (41212311321214).

The spelling of 21101210111102 in words is "twenty-one trillion, one hundred one billion, two hundred ten million, one hundred eleven thousand, one hundred two".