21403312241012 has 48 divisors (see below), whose sum is σ = 42469920292800. Its totient is φ = 9356349450240.

The previous prime is 21403312241009. The next prime is 21403312241041. The reversal of 21403312241012 is 21014221330412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1712087 + ... + 6762977.

It is an arithmetic number, because the mean of its divisors is an integer number (884790006100).

Almost surely, 2^{21403312241012} is an apocalyptic number.

It is an amenable number.

21403312241012 is a deficient number, since it is larger than the sum of its proper divisors (21066608051788).

21403312241012 is a wasteful number, since it uses less digits than its factorization.

21403312241012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055216 (or 5055214 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21403312241012 its reverse (21014221330412), we get a palindrome (42417533571424).

The spelling of 21403312241012 in words is "twenty-one trillion, four hundred three billion, three hundred twelve million, two hundred forty-one thousand, twelve".