2211221001000 has 128 divisors (see below), whose sum is σ = 7526192319360. Its totient is φ = 536053568000.

The previous prime is 2211221000903. The next prime is 2211221001019. The reversal of 2211221001000 is 1001221122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33470349 + ... + 33536348.

It is an arithmetic number, because the mean of its divisors is an integer number (58798377495).

Almost surely, 2^{2211221001000} is an apocalyptic number.

2211221001000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211221001000 is an abundant number, since it is smaller than the sum of its proper divisors (5314971318360).

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

2211221001000 is a wasteful number, since it uses less digits than its factorization.

2211221001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67006732 (or 67006718 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2211221001000 its reverse (1001221122), we get a palindrome (2212222222122).

It can be divided in two parts, 221 and 1221001000, that added together give a palindrome (1221001221).

The spelling of 2211221001000 in words is "two trillion, two hundred eleven billion, two hundred twenty-one million, one thousand".