21142423301200 has 60 divisors (see below), whose sum is σ = 50845928910208. Its totient is φ = 8448435388800.

The previous prime is 21142423301143. The next prime is 21142423301203. The reversal of 21142423301200 is 210332424112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142423301203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26271642 + ... + 27064441.

Almost surely, 2^{21142423301200} is an apocalyptic number.

21142423301200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21142423301200 is an abundant number, since it is smaller than the sum of its proper divisors (29703505609008).

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

21142423301200 is a wasteful number, since it uses less digits than its factorization.

21142423301200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53337092 (or 53337081 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21142423301200 its reverse (210332424112), we get a palindrome (21352755725312).

The spelling of 21142423301200 in words is "twenty-one trillion, one hundred forty-two billion, four hundred twenty-three million, three hundred one thousand, two hundred".