201020111020100 has 72 divisors (see below), whose sum is σ = 436479248436000. Its totient is φ = 80359099660800.

The previous prime is 201020111020073. The next prime is 201020111020121. The reversal of 201020111020100 is 1020111020102.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1098805436 + ... + 1098988364.

Almost surely, 2^{201020111020100} is an apocalyptic number.

201020111020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201020111020100 is an abundant number, since it is smaller than the sum of its proper divisors (235459137415900).

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

201020111020100 is a wasteful number, since it uses less digits than its factorization.

201020111020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189573 (or 189566 counting only the distinct ones).

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

Adding to 201020111020100 its reverse (1020111020102), we get a palindrome (202040222040202).

The spelling of 201020111020100 in words is "two hundred one trillion, twenty billion, one hundred eleven million, twenty thousand, one hundred".