21445252000123 has 8 divisors (see below), whose sum is σ = 24737914190592. Its totient is φ = 18209853500136.

The previous prime is 21445252000099. The next prime is 21445252000127. The reversal of 21445252000123 is 32100025254412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21445252000123 - 2¹³ = 21445251991931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21445252000127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14315921815 + ... + 14315923312.

It is an arithmetic number, because the mean of its divisors is an integer number (3092239273824).

Almost surely, 2^{21445252000123} is an apocalyptic number.

21445252000123 is a deficient number, since it is larger than the sum of its proper divisors (3292662190469).

21445252000123 is a wasteful number, since it uses less digits than its factorization.

21445252000123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28631845241.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 21445252000123 its reverse (32100025254412), we get a palindrome (53545277254535).

The spelling of 21445252000123 in words is "twenty-one trillion, four hundred forty-five billion, two hundred fifty-two million, one hundred twenty-three", and thus it is an aban number.