21044101012 has 24 divisors (see below), whose sum is σ = 40196640960. Its totient is φ = 9560372160.

The previous prime is 21044101009. The next prime is 21044101021. The reversal of 21044101012 is 21010144012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44593 + ... + 209944.

It is an arithmetic number, because the mean of its divisors is an integer number (1674860040).

Almost surely, 2^21044101012 is an apocalyptic number.

21044101012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21044101012 is a deficient number, since it is larger than the sum of its proper divisors (19152539948).

21044101012 is a wasteful number, since it uses less digits than its factorization.

21044101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256431 (or 256429 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21044101012 its reverse (21010144012), we get a palindrome (42054245024).

The spelling of 21044101012 in words is "twenty-one billion, forty-four million, one hundred one thousand, twelve".