101221100200 has 96 divisors (see below), whose sum is σ = 267895978560. Its totient is φ = 35207321600.

The previous prime is 101221100191. The next prime is 101221100203. The reversal of 101221100200 is 2001122101.

It is a super-2 number, since 2×101221100200² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (101221100203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 949609 + ... + 1050808.

It is an arithmetic number, because the mean of its divisors is an integer number (2790583110).

Almost surely, 2^101221100200 is an apocalyptic number.

101221100200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221100200 is an abundant number, since it is smaller than the sum of its proper divisors (166674878360).

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

101221100200 is a wasteful number, since it uses less digits than its factorization.

101221100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000467 (or 2000458 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 101221100200 its reverse (2001122101), we get a palindrome (103222222301).

The spelling of 101221100200 in words is "one hundred one billion, two hundred twenty-one million, one hundred thousand, two hundred".