20101121200 has 60 divisors (see below), whose sum is σ = 48307932400. Its totient is φ = 8037953280.

The previous prime is 20101121143. The next prime is 20101121207. The reversal of 20101121200 is 212110102.

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 (20101121207) 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, 1814077 + ... + 1825123.

Almost surely, 2^20101121200 is an apocalyptic number.

20101121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101121200 is an abundant number, since it is smaller than the sum of its proper divisors (28206811200).

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

20101121200 is a wasteful number, since it uses less digits than its factorization.

20101121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15614 (or 15603 counting only the distinct ones).

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

Adding to 20101121200 its reverse (212110102), we get a palindrome (20313231302).

The spelling of 20101121200 in words is "twenty billion, one hundred one million, one hundred twenty-one thousand, two hundred".