201211011020220 has 24 divisors (see below), whose sum is σ = 563390830856784. Its totient is φ = 53656269605376.

The previous prime is 201211011020219. The next prime is 201211011020263. The reversal of 201211011020220 is 22020110112102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 201211011020220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1676758425109 + ... + 1676758425228.

It is an arithmetic number, because the mean of its divisors is an integer number (23474617952366).

Almost surely, 2^{201211011020220} is an apocalyptic number.

201211011020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201211011020220 is an abundant number, since it is smaller than the sum of its proper divisors (362179819836564).

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

201211011020220 is a wasteful number, since it uses less digits than its factorization.

201211011020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3353516850349 (or 3353516850347 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201211011020220 its reverse (22020110112102), we get a palindrome (223231121132322).

The spelling of 201211011020220 in words is "two hundred one trillion, two hundred eleven billion, eleven million, twenty thousand, two hundred twenty".