222211112121000 has 1536 divisors, whose sum is σ = 816398211133440. Its totient is φ = 54400896000000.

The previous prime is 222211112120989. The next prime is 222211112121017. The reversal of 222211112121000 is 121211112222.

222211112121000 is a `hidden beast` number, since 2 + 222 + 111 + 121 + 210 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 69855739410 + ... + 69855742590.

It is an arithmetic number, because the mean of its divisors is an integer number (531509252040).

Almost surely, 2^{222211112121000} is an apocalyptic number.

222211112121000 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 222211112121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (408199105566720).

222211112121000 is an abundant number, since it is smaller than the sum of its proper divisors (594187099012440).

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

222211112121000 is a wasteful number, since it uses less digits than its factorization.

222211112121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3444 (or 3427 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 222211112121000 its reverse (121211112222), we get a palindrome (222332323233222).

It can be divided in two parts, 222211 and 112121000, that added together give a palindrome (112343211).

The spelling of 222211112121000 in words is "two hundred twenty-two trillion, two hundred eleven billion, one hundred twelve million, one hundred twenty-one thousand".