211220010010000 has 200 divisors, whose sum is σ = 528456169894400. Its totient is φ = 81673505280000.

The previous prime is 211220010009989. The next prime is 211220010010063. The reversal of 211220010010000 is 10010022112.

It is a tau number, because it is divible by the number of its divisors (200).

It is a super-2 number, since 2×211220010010000² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 284519296 + ... + 285260704.

It is an arithmetic number, because the mean of its divisors is an integer number (2642280849472).

Almost surely, 2^{211220010010000} is an apocalyptic number.

211220010010000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211220010010000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264228084947200).

211220010010000 is an abundant number, since it is smaller than the sum of its proper divisors (317236159884400).

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

211220010010000 is an equidigital number, since it uses as much as digits as its factorization.

211220010010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742387 (or 742366 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 211220010010000 its reverse (10010022112), we get a palindrome (211230020032112).

The spelling of 211220010010000 in words is "two hundred eleven trillion, two hundred twenty billion, ten million, ten thousand".