1220111331010 has 64 divisors (see below), whose sum is σ = 2606751310464. Its totient is φ = 405325670400.

The previous prime is 1220111330959. The next prime is 1220111331011. The reversal of 1220111331010 is 101331110221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1220111331011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4259356 + ... + 4536775.

It is an arithmetic number, because the mean of its divisors is an integer number (40730489226).

Almost surely, 2^{1220111331010} is an apocalyptic number.

1220111331010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220111331010 is an abundant number, since it is smaller than the sum of its proper divisors (1386639979454).

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

1220111331010 is a wasteful number, since it uses less digits than its factorization.

1220111331010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8796259.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1220111331010 its reverse (101331110221), we get a palindrome (1321442441231).

The spelling of 1220111331010 in words is "one trillion, two hundred twenty billion, one hundred eleven million, three hundred thirty-one thousand, ten".