201020021211918 has 16 divisors (see below), whose sum is σ = 402042434734800. Its totient is φ = 67006275018816.

The previous prime is 201020021211917. The next prime is 201020021212007. The reversal of 201020021211918 is 819112120020102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020021211917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98586343 + ... + 100604706.

It is an arithmetic number, because the mean of its divisors is an integer number (25127652170925).

Almost surely, 2^{201020021211918} is an apocalyptic number.

201020021211918 is an abundant number, since it is smaller than the sum of its proper divisors (201022413522882).

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

201020021211918 is a wasteful number, since it uses less digits than its factorization.

201020021211918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199359251.

The product of its (nonzero) digits is 1152, while the sum is 30.

The spelling of 201020021211918 in words is "two hundred one trillion, twenty billion, twenty-one million, two hundred eleven thousand, nine hundred eighteen".