1221332220231 has 8 divisors (see below), whose sum is σ = 1628535121920. Its totient is φ = 814175399352.

The previous prime is 1221332220223. The next prime is 1221332220271. The reversal of 1221332220231 is 1320222331221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1221332220231 - 2³ = 1221332220223 is a prime.

It is a super-2 number, since 2×1221332220231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221332220271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11458311 + ... + 11564408.

It is an arithmetic number, because the mean of its divisors is an integer number (203566890240).

Almost surely, 2^{1221332220231} is an apocalyptic number.

1221332220231 is a deficient number, since it is larger than the sum of its proper divisors (407202901689).

1221332220231 is a wasteful number, since it uses less digits than its factorization.

1221332220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23040405.

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

Adding to 1221332220231 its reverse (1320222331221), we get a palindrome (2541554551452).

The spelling of 1221332220231 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-two million, two hundred twenty thousand, two hundred thirty-one".