211220200121000 has 96 divisors (see below), whose sum is σ = 574950006095400. Its totient is φ = 72418354310400.

The previous prime is 211220200120961. The next prime is 211220200121071. The reversal of 211220200121000 is 121002022112.

It can be written as a sum of positive squares in 4 ways, for example, as 35397002413444 + 175823197707556 = 5949538^2 + 13259834^2 .

It is a super-2 number, since 2×211220200121000² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2155259165 + ... + 2155357164.

Almost surely, 2^{211220200121000} is an apocalyptic number.

211220200121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211220200121000 is an abundant number, since it is smaller than the sum of its proper divisors (363729805974400).

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

211220200121000 is a wasteful number, since it uses less digits than its factorization.

211220200121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310616364 (or 4310616343 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211220200121000 its reverse (121002022112), we get a palindrome (211341202143112).

The spelling of 211220200121000 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred million, one hundred twenty-one thousand".