21210100101212 has 96 divisors (see below), whose sum is σ = 40801138560000. Its totient is φ = 9567687127040.

The previous prime is 21210100101181. The next prime is 21210100101217.

21210100101212 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210100101217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4562290664 + ... + 4562295312.

It is an arithmetic number, because the mean of its divisors is an integer number (425011860000).

Almost surely, 2^{21210100101212} is an apocalyptic number.

21210100101212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21210100101212 is a deficient number, since it is larger than the sum of its proper divisors (19591038458788).

21210100101212 is a wasteful number, since it uses less digits than its factorization.

21210100101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6299 (or 6297 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

It can be divided in two parts, 21210100 and 101212, that added together give a palindrome (21311312).

The spelling of 21210100101212 in words is "twenty-one trillion, two hundred ten billion, one hundred million, one hundred one thousand, two hundred twelve".