1221202302331 has 6 divisors (see below), whose sum is σ = 1342313274596. Its totient is φ = 1110183911100.

The previous prime is 1221202302283. The next prime is 1221202302343. The reversal of 1221202302331 is 1332032021221.

It is not a de Polignac number, because 1221202302331 - 2¹⁵ = 1221202269563 is a prime.

It is a super-2 number, since 2×1221202302331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221202302031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5046290385 + ... + 5046290626.

Almost surely, 2^{1221202302331} is an apocalyptic number.

1221202302331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1221202302331 is a deficient number, since it is larger than the sum of its proper divisors (121110972265).

1221202302331 is a wasteful number, since it uses less digits than its factorization.

1221202302331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10092581033 (or 10092581022 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1221202302331 its reverse (1332032021221), we get a palindrome (2553234323552).

The spelling of 1221202302331 in words is "one trillion, two hundred twenty-one billion, two hundred two million, three hundred two thousand, three hundred thirty-one".