1002011222220 has 48 divisors (see below), whose sum is σ = 2806096715520. Its totient is φ = 267158678976.

The previous prime is 1002011222213. The next prime is 1002011222227. The reversal of 1002011222220 is 222221102001.

It is an interprime number because it is at equal distance from previous prime (1002011222213) and next prime (1002011222227).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1002011222220.

It is not an unprimeable number, because it can be changed into a prime (1002011222227) 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, 1019200 + ... + 1744359.

It is an arithmetic number, because the mean of its divisors is an integer number (58460348240).

Almost surely, 2^{1002011222220} is an apocalyptic number.

1002011222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002011222220 is an abundant number, since it is smaller than the sum of its proper divisors (1804085493300).

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

1002011222220 is a wasteful number, since it uses less digits than its factorization.

1002011222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769614 (or 2769612 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1002011222220 its reverse (222221102001), we get a palindrome (1224232324221).

The spelling of 1002011222220 in words is "one trillion, two billion, eleven million, two hundred twenty-two thousand, two hundred twenty".