20010101121200 has 60 divisors (see below), whose sum is σ = 48352154052768. Its totient is φ = 7957774291200.

The previous prime is 20010101121083. The next prime is 20010101121211. The reversal of 20010101121200 is 212110101002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144512456 + ... + 144650855.

Almost surely, 2^{20010101121200} is an apocalyptic number.

20010101121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010101121200 is an abundant number, since it is smaller than the sum of its proper divisors (28342052931568).

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

20010101121200 is a wasteful number, since it uses less digits than its factorization.

20010101121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289163502 (or 289163491 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20010101121200 its reverse (212110101002), we get a palindrome (20222211222202).

The spelling of 20010101121200 in words is "twenty trillion, ten billion, one hundred one million, one hundred twenty-one thousand, two hundred".