21244214021012 has 48 divisors (see below), whose sum is σ = 37615305842688. Its totient is φ = 10497710976480.

The previous prime is 21244214021011. The next prime is 21244214021027. The reversal of 21244214021012 is 21012041244212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21244214021011) 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, 136359263 + ... + 136514969.

It is an arithmetic number, because the mean of its divisors is an integer number (783652205056).

Almost surely, 2^{21244214021012} is an apocalyptic number.

It is an amenable number.

21244214021012 is a deficient number, since it is larger than the sum of its proper divisors (16371091821676).

21244214021012 is a wasteful number, since it uses less digits than its factorization.

21244214021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156876 (or 156874 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 21244214021012 its reverse (21012041244212), we get a palindrome (42256255265224).

The spelling of 21244214021012 in words is "twenty-one trillion, two hundred forty-four billion, two hundred fourteen million, twenty-one thousand, twelve".