1001222101020 has 48 divisors (see below), whose sum is σ = 2803511789568. Its totient is φ = 266983997760.

The previous prime is 1001222100953. The next prime is 1001222101063. The reversal of 1001222101020 is 201012221001.

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

It is a junction number, because it is equal to n+sod(n) for n = 1001222100987 and 1001222101005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1743865 + ... + 2245775.

It is an arithmetic number, because the mean of its divisors is an integer number (58406495616).

Almost surely, 2^{1001222101020} is an apocalyptic number.

1001222101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001222101020 is an abundant number, since it is smaller than the sum of its proper divisors (1802289688548).

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

1001222101020 is a wasteful number, since it uses less digits than its factorization.

1001222101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535170 (or 535168 counting only the distinct ones).

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

Adding to 1001222101020 its reverse (201012221001), we get a palindrome (1202234322021).

The spelling of 1001222101020 in words is "one trillion, one billion, two hundred twenty-two million, one hundred one thousand, twenty".