1001012122220 has 96 divisors (see below), whose sum is σ = 2417569652736. Its totient is φ = 344767276800.

The previous prime is 1001012122219. The next prime is 1001012122237. The reversal of 1001012122220 is 222212101001.

It is a junction number, because it is equal to n+sod(n) for n = 1001012122195 and 1001012122204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1240907 + ... + 1881986.

It is an arithmetic number, because the mean of its divisors is an integer number (25183017216).

Almost surely, 2^{1001012122220} is an apocalyptic number.

1001012122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001012122220 is an abundant number, since it is smaller than the sum of its proper divisors (1416557530516).

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

1001012122220 is a wasteful number, since it uses less digits than its factorization.

1001012122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3122991 (or 3122989 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1001012122220 its reverse (222212101001), we get a palindrome (1223224223221).

The spelling of 1001012122220 in words is "one trillion, one billion, twelve million, one hundred twenty-two thousand, two hundred twenty".