201211010220 has 96 divisors (see below), whose sum is σ = 620693611776. Its totient is φ = 48295456000.

The previous prime is 201211010191. The next prime is 201211010233. The reversal of 201211010220 is 22010112102.

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

It is a junction number, because it is equal to n+sod(n) for n = 201211010196 and 201211010205.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1442574 + ... + 1575893.

It is an arithmetic number, because the mean of its divisors is an integer number (6465558456).

Almost surely, 2^201211010220 is an apocalyptic number.

201211010220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201211010220 is an abundant number, since it is smaller than the sum of its proper divisors (419482601556).

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

201211010220 is a wasteful number, since it uses less digits than its factorization.

201211010220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3018591 (or 3018589 counting only the distinct ones).

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

Adding to 201211010220 its reverse (22010112102), we get a palindrome (223221122322).

The spelling of 201211010220 in words is "two hundred one billion, two hundred eleven million, ten thousand, two hundred twenty".