21320444141012 has 12 divisors (see below), whose sum is σ = 37821883784916. Its totient is φ = 10514191631040.

The previous prime is 21320444140873. The next prime is 21320444141021. The reversal of 21320444141012 is 21014144402312.

It can be written as a sum of positive squares in 2 ways, for example, as 12600199704976 + 8720244436036 = 3549676^2 + 2953006^2 .

It is a super-2 number, since 2×21320444141012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36507609539 + ... + 36507610122.

It is an arithmetic number, because the mean of its divisors is an integer number (3151823648743).

Almost surely, 2^{21320444141012} is an apocalyptic number.

It is an amenable number.

21320444141012 is a deficient number, since it is larger than the sum of its proper divisors (16501439643904).

21320444141012 is a wasteful number, since it uses less digits than its factorization.

21320444141012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73015219738 (or 73015219736 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 21320444141012 its reverse (21014144402312), we get a palindrome (42334588543324).

The spelling of 21320444141012 in words is "twenty-one trillion, three hundred twenty billion, four hundred forty-four million, one hundred forty-one thousand, twelve".