21101012120012 has 48 divisors (see below), whose sum is σ = 40359423267072. Its totient is φ = 9573365081280.

The previous prime is 21101012119981. The next prime is 21101012120017. The reversal of 21101012120012 is 21002121010112.

It is not an unprimeable number, because it can be changed into a prime (21101012120017) 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 15 ways as a sum of consecutive naturals, for example, 63907298 + ... + 64236630.

It is an arithmetic number, because the mean of its divisors is an integer number (840821318064).

Almost surely, 2^{21101012120012} is an apocalyptic number.

21101012120012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21101012120012 is a deficient number, since it is larger than the sum of its proper divisors (19258411147060).

21101012120012 is a wasteful number, since it uses less digits than its factorization.

21101012120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332078 (or 332076 counting only the distinct ones).

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

Adding to 21101012120012 its reverse (21002121010112), we get a palindrome (42103133130124).

The spelling of 21101012120012 in words is "twenty-one trillion, one hundred one billion, twelve million, one hundred twenty thousand, twelve".