201220011012 has 96 divisors (see below), whose sum is σ = 511407122688. Its totient is φ = 61320720384.

The previous prime is 201220010987. The next prime is 201220011019. The reversal of 201220011012 is 210110022102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (201220011019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4635513 + ... + 4678719.

It is an arithmetic number, because the mean of its divisors is an integer number (5327157528).

Almost surely, 2^201220011012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201220011012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255703561344).

201220011012 is an abundant number, since it is smaller than the sum of its proper divisors (310187111676).

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

201220011012 is a wasteful number, since it uses less digits than its factorization.

201220011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43885 (or 43883 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201220011012 its reverse (210110022102), we get a palindrome (411330033114).

The spelling of 201220011012 in words is "two hundred one billion, two hundred twenty million, eleven thousand, twelve".