211101201011220 has 96 divisors (see below), whose sum is σ = 637118147551872. Its totient is φ = 51917100415488.

The previous prime is 211101201011191. The next prime is 211101201011269. The reversal of 211101201011220 is 22110102101112.

It is a happy number.

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 211101201011220.

It is a congruent number.

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, 119623867 + ... + 121375746.

It is an arithmetic number, because the mean of its divisors is an integer number (6636647370332).

Almost surely, 2^{211101201011220} is an apocalyptic number.

211101201011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211101201011220 is an abundant number, since it is smaller than the sum of its proper divisors (426016946540652).

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

211101201011220 is a wasteful number, since it uses less digits than its factorization.

211101201011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241000761 (or 241000759 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211101201011220 its reverse (22110102101112), we get a palindrome (233211303112332).

The spelling of 211101201011220 in words is "two hundred eleven trillion, one hundred one billion, two hundred one million, eleven thousand, two hundred twenty".