21400201200 has 180 divisors, whose sum is σ = 79744356600. Its totient is φ = 4891461120.

The previous prime is 21400201183. The next prime is 21400201219. The reversal of 21400201200 is 210200412.

It is a super-2 number, since 2×21400201200² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 123175 + ... + 240774.

Almost surely, 2^21400201200 is an apocalyptic number.

21400201200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21400201200 is an abundant number, since it is smaller than the sum of its proper divisors (58344155400).

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

21400201200 is a wasteful number, since it uses less digits than its factorization.

21400201200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363984 (or 363966 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21400201200 its reverse (210200412), we get a palindrome (21610401612).

The spelling of 21400201200 in words is "twenty-one billion, four hundred million, two hundred one thousand, two hundred".