21401033200 has 30 divisors (see below), whose sum is σ = 51415983224. Its totient is φ = 8560413120.

The previous prime is 21401033197. The next prime is 21401033201. The reversal of 21401033200 is 233010412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401033201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26750892 + ... + 26751691.

Almost surely, 2^21401033200 is an apocalyptic number.

21401033200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21401033200 is an abundant number, since it is smaller than the sum of its proper divisors (30014950024).

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

21401033200 is a wasteful number, since it uses less digits than its factorization.

21401033200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53502601 (or 53502590 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21401033200 its reverse (233010412), we get a palindrome (21634043612).

The spelling of 21401033200 in words is "twenty-one billion, four hundred one million, thirty-three thousand, two hundred".