211011001011220 has 48 divisors (see below), whose sum is σ = 458417643143040. Its totient is φ = 81491337785984.

The previous prime is 211011001011211. The next prime is 211011001011233. The reversal of 211011001011220 is 22110100110112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 211011001011220.

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, 12759387 + ... + 24183133.

It is an arithmetic number, because the mean of its divisors is an integer number (9550367565480).

Almost surely, 2^{211011001011220} is an apocalyptic number.

211011001011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211011001011220 is an abundant number, since it is smaller than the sum of its proper divisors (247406642131820).

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

211011001011220 is a wasteful number, since it uses less digits than its factorization.

211011001011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11455632 (or 11455630 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211011001011220 its reverse (22110100110112), we get a palindrome (233121101121332).

The spelling of 211011001011220 in words is "two hundred eleven trillion, eleven billion, one million, eleven thousand, two hundred twenty".