201211002211220 has 24 divisors (see below), whose sum is σ = 423170954753064. Its totient is φ = 80364810387456.

The previous prime is 201211002211207. The next prime is 201211002211249. The reversal of 201211002211220 is 22112200112102.

It can be written as a sum of positive squares in 4 ways, for example, as 36405077130244 + 164805925080976 = 6033662^2 + 12837676^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7474392269 + ... + 7474419188.

It is an arithmetic number, because the mean of its divisors is an integer number (17632123114711).

Almost surely, 2^{201211002211220} is an apocalyptic number.

201211002211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201211002211220 is an abundant number, since it is smaller than the sum of its proper divisors (221959952541844).

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

201211002211220 is a wasteful number, since it uses less digits than its factorization.

201211002211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14948812139 (or 14948812137 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201211002211220 its reverse (22112200112102), we get a palindrome (223323202323322).

The spelling of 201211002211220 in words is "two hundred one trillion, two hundred eleven billion, two million, two hundred eleven thousand, two hundred twenty".