20021201001100 has 36 divisors (see below), whose sum is σ = 46788006650224. Its totient is φ = 7392443446080.

The previous prime is 20021201001049. The next prime is 20021201001119. The reversal of 20021201001100 is 110010212002.

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

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, 7700460624 + ... + 7700463223.

Almost surely, 2^{20021201001100} is an apocalyptic number.

20021201001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021201001100 is an abundant number, since it is smaller than the sum of its proper divisors (26766805649124).

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

20021201001100 is a wasteful number, since it uses less digits than its factorization.

20021201001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15400923874 (or 15400923867 counting only the distinct ones).

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

Adding to 20021201001100 its reverse (110010212002), we get a palindrome (20131211213102).

The spelling of 20021201001100 in words is "twenty trillion, twenty-one billion, two hundred one million, one thousand, one hundred".