21123444301304 has 16 divisors (see below), whose sum is σ = 40527538485720. Its totient is φ = 10316100705120.

The previous prime is 21123444301301. The next prime is 21123444301307. The reversal of 21123444301304 is 40310344432112.

It is an interprime number because it is at equal distance from previous prime (21123444301301) and next prime (21123444301307).

It is a super-2 number, since 2×21123444301304² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123444301301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30702680327 + ... + 30702681014.

Almost surely, 2^{21123444301304} is an apocalyptic number.

It is an amenable number.

21123444301304 is a deficient number, since it is larger than the sum of its proper divisors (19404094184416).

21123444301304 is a wasteful number, since it uses less digits than its factorization.

21123444301304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61405361390 (or 61405361386 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21123444301304 its reverse (40310344432112), we get a palindrome (61433788733416).

The spelling of 21123444301304 in words is "twenty-one trillion, one hundred twenty-three billion, four hundred forty-four million, three hundred one thousand, three hundred four".