21143202114400 has 72 divisors (see below), whose sum is σ = 51647569890840. Its totient is φ = 8452082242560.

The previous prime is 21143202114323. The next prime is 21143202114481. The reversal of 21143202114400 is 441120234112.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6820405 + ... + 9423604.

It is an arithmetic number, because the mean of its divisors is an integer number (717327359595).

Almost surely, 2^{21143202114400} is an apocalyptic number.

21143202114400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21143202114400 is an abundant number, since it is smaller than the sum of its proper divisors (30504367776440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21143202114400 is a wasteful number, since it uses less digits than its factorization.

21143202114400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16245656 (or 16245643 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21143202114400 its reverse (441120234112), we get a palindrome (21584322348512).

The spelling of 21143202114400 in words is "twenty-one trillion, one hundred forty-three billion, two hundred two million, one hundred fourteen thousand, four hundred".