1221331223202 has 32 divisors (see below), whose sum is σ = 2452053763392. Its totient is φ = 405547902144.

The previous prime is 1221331223201. The next prime is 1221331223207. The reversal of 1221331223202 is 2023221331221.

It is not an unprimeable number, because it can be changed into a prime (1221331223201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1464513 + ... + 2141835.

It is an arithmetic number, because the mean of its divisors is an integer number (76626680106).

Almost surely, 2^{1221331223202} is an apocalyptic number.

1221331223202 is an abundant number, since it is smaller than the sum of its proper divisors (1230722540190).

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

1221331223202 is a wasteful number, since it uses less digits than its factorization.

1221331223202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678482.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1221331223202 its reverse (2023221331221), we get a palindrome (3244552554423).

The spelling of 1221331223202 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-one million, two hundred twenty-three thousand, two hundred two".