201211222220 has 12 divisors (see below), whose sum is σ = 422543566704. Its totient is φ = 80484488880.

The previous prime is 201211222189. The next prime is 201211222231. The reversal of 201211222220 is 22222112102.

It is a happy 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, 5030280536 + ... + 5030280575.

It is an arithmetic number, because the mean of its divisors is an integer number (35211963892).

Almost surely, 2^201211222220 is an apocalyptic number.

201211222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201211222220 is an abundant number, since it is smaller than the sum of its proper divisors (221332344484).

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

201211222220 is a wasteful number, since it uses less digits than its factorization.

201211222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060561120 (or 10060561118 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 201211222220 its reverse (22222112102), we get a palindrome (223433334322).

The spelling of 201211222220 in words is "two hundred one billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty".