1221022220010 has 16 divisors (see below), whose sum is σ = 2930453328096. Its totient is φ = 325605925328.

The previous prime is 1221022219987. The next prime is 1221022220039. The reversal of 1221022220010 is 100222201221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20350370304 + ... + 20350370363.

It is an arithmetic number, because the mean of its divisors is an integer number (183153333006).

Almost surely, 2^{1221022220010} is an apocalyptic number.

1221022220010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221022220010 is an abundant number, since it is smaller than the sum of its proper divisors (1709431108086).

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

1221022220010 is a wasteful number, since it uses less digits than its factorization.

1221022220010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40700740677.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1221022220010 its reverse (100222201221), we get a palindrome (1321244421231).

The spelling of 1221022220010 in words is "one trillion, two hundred twenty-one billion, twenty-two million, two hundred twenty thousand, ten".