1000221222000 has 1920 divisors, whose sum is σ = 4533147859968. Its totient is φ = 186375168000.

The previous prime is 1000221221983. The next prime is 1000221222017. The reversal of 1000221222000 is 2221220001.

It is an interprime number because it is at equal distance from previous prime (1000221221983) and next prime (1000221222017).

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

It is a congruent number.

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, 1555553679 + ... + 1555554321.

Almost surely, 2^{1000221222000} is an apocalyptic number.

1000221222000 is a gapful number since it is divisible by the number (10) 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 1000221222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2266573929984).

1000221222000 is an abundant number, since it is smaller than the sum of its proper divisors (3532926637968).

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

1000221222000 is a wasteful number, since it uses less digits than its factorization.

1000221222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744 (or 721 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1000221222000 its reverse (2221220001), we get a palindrome (1002442442001).

It can be divided in two parts, 1000221 and 222000, that added together give a palindrome (1222221).

The spelling of 1000221222000 in words is "one trillion, two hundred twenty-one million, two hundred twenty-two thousand".