101221201200 has 180 divisors, whose sum is σ = 377183466600. Its totient is φ = 23136261120.

The previous prime is 101221201177. The next prime is 101221201201. The reversal of 101221201200 is 2102122101.

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

It is not an unprimeable number, because it can be changed into a prime (101221201201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 801925 + ... + 919524.

Almost surely, 2^101221201200 is an apocalyptic number.

101221201200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221201200 is an abundant number, since it is smaller than the sum of its proper divisors (275962265400).

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

101221201200 is a wasteful number, since it uses less digits than its factorization.

101221201200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721484 (or 1721466 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 101221201200 its reverse (2102122101), we get a palindrome (103323323301).

The spelling of 101221201200 in words is "one hundred one billion, two hundred twenty-one million, two hundred one thousand, two hundred".