21012244221012 has 48 divisors (see below), whose sum is σ = 53626835942400. Its totient is φ = 6350546331360.

The previous prime is 21012244221011. The next prime is 21012244221119.

21012244221012 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 (21012244221011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209954812 + ... + 210054867.

It is an arithmetic number, because the mean of its divisors is an integer number (1117225748800).

Almost surely, 2^{21012244221012} is an apocalyptic number.

21012244221012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21012244221012 is an abundant number, since it is smaller than the sum of its proper divisors (32614591721388).

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

21012244221012 is a wasteful number, since it uses less digits than its factorization.

21012244221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420010076 (or 420010074 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

It can be divided in two parts, 2101224 and 4221012, that added together give a palindrome (6322236).

The spelling of 21012244221012 in words is "twenty-one trillion, twelve billion, two hundred forty-four million, two hundred twenty-one thousand, twelve".