1221110110010 has 192 divisors, whose sum is σ = 2694094110720. Its totient is φ = 396824883840.

The previous prime is 1221110109941. The next prime is 1221110110027. The reversal of 1221110110010 is 100110111221.

It is a super-2 number, since 2×1221110110010² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221110109973 and 1221110110000.

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 95 ways as a sum of consecutive naturals, for example, 182170319 + ... + 182177021.

It is an arithmetic number, because the mean of its divisors is an integer number (14031740160).

Almost surely, 2^{1221110110010} is an apocalyptic number.

1221110110010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221110110010 is an abundant number, since it is smaller than the sum of its proper divisors (1472984000710).

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

1221110110010 is a wasteful number, since it uses less digits than its factorization.

1221110110010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7001 (or 6994 counting only the distinct ones).

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

Adding to 1221110110010 its reverse (100110111221), we get a palindrome (1321220221231).

The spelling of 1221110110010 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, one hundred ten thousand, ten".