2001111222 has 32 divisors (see below), whose sum is σ = 4437644544. Its totient is φ = 596455200.

The previous prime is 2001111221. The next prime is 2001111223. The reversal of 2001111222 is 2221111002.

It is an interprime number because it is at equal distance from previous prime (2001111221) and next prime (2001111223).

It is a super-2 number, since 2×2001111222² = 8008892245628666568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001111198 and 2001111207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001111221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244498 + ... + 252549.

It is an arithmetic number, because the mean of its divisors is an integer number (138676392).

Almost surely, 2^2001111222 is an apocalyptic number.

2001111222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2001111222 is an abundant number, since it is smaller than the sum of its proper divisors (2436533322).

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

2001111222 is a wasteful number, since it uses less digits than its factorization.

2001111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497124.

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

The square root of 2001111222 is about 44733.7816644200. The cubic root of 2001111222 is about 1260.1543486906.

Adding to 2001111222 its reverse (2221111002), we get a palindrome (4222222224).

It can be divided in two parts, 2001 and 111222, that multiplied together give a palindrome (222555222).

The spelling of 2001111222 in words is "two billion, one million, one hundred eleven thousand, two hundred twenty-two".