201011111011220 has 48 divisors (see below), whose sum is σ = 452611764541440. Its totient is φ = 74716862697984.

The previous prime is 201011111011181. The next prime is 201011111011261. The reversal of 201011111011220 is 22110111110102.

It is a junction number, because it is equal to n+sod(n) for n = 201011111011195 and 201011111011204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3741803204 + ... + 3741856923.

It is an arithmetic number, because the mean of its divisors is an integer number (9429411761280).

Almost surely, 2^{201011111011220} is an apocalyptic number.

201011111011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201011111011220 is an abundant number, since it is smaller than the sum of its proper divisors (251600653530220).

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

201011111011220 is a wasteful number, since it uses less digits than its factorization.

201011111011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7483660232 (or 7483660230 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 201011111011220 its reverse (22110111110102), we get a palindrome (223121222121322).

The spelling of 201011111011220 in words is "two hundred one trillion, eleven billion, one hundred eleven million, eleven thousand, two hundred twenty".