201142220636 has 12 divisors (see below), whose sum is σ = 402284441328. Its totient is φ = 86203808832.

The previous prime is 201142220581. The next prime is 201142220641. The reversal of 201142220636 is 636022241102.

201142220636 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 201142220599 and 201142220608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3591825341 + ... + 3591825396.

It is an arithmetic number, because the mean of its divisors is an integer number (33523703444).

Almost surely, 2^201142220636 is an apocalyptic number.

It is an amenable number.

201142220636 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

201142220636 is a wasteful number, since it uses less digits than its factorization.

201142220636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7183650748 (or 7183650746 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 201142220636 its reverse (636022241102), we get a palindrome (837164461738).

The spelling of 201142220636 in words is "two hundred one billion, one hundred forty-two million, two hundred twenty thousand, six hundred thirty-six".