1001221111010 has 16 divisors (see below), whose sum is σ = 1840542638976. Its totient is φ = 391967413488.

The previous prime is 1001221110941. The next prime is 1001221111021. The reversal of 1001221111010 is 101111221001.

It is a junction number, because it is equal to n+sod(n) for n = 1001221110982 and 1001221111000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1065128372 + ... + 1065129311.

It is an arithmetic number, because the mean of its divisors is an integer number (115033914936).

Almost surely, 2^{1001221111010} is an apocalyptic number.

1001221111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1001221111010 is a deficient number, since it is larger than the sum of its proper divisors (839321527966).

1001221111010 is a wasteful number, since it uses less digits than its factorization.

1001221111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130257737.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1001221111010 its reverse (101111221001), we get a palindrome (1102332332011).

The spelling of 1001221111010 in words is "one trillion, one billion, two hundred twenty-one million, one hundred eleven thousand, ten".