1221232213031 has 8 divisors (see below), whose sum is σ = 1244451479040. Its totient is φ = 1198019508192.

The previous prime is 1221232213007. The next prime is 1221232213039. The reversal of 1221232213031 is 1303122321221.

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

It is not a de Polignac number, because 1221232213031 - 2¹⁰ = 1221232212007 is a prime.

It is a super-2 number, since 2×1221232213031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221232212988 and 1221232213006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221232213039) 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, 1263680 + ... + 2009813.

It is an arithmetic number, because the mean of its divisors is an integer number (155556434880).

Almost surely, 2^{1221232213031} is an apocalyptic number.

1221232213031 is a deficient number, since it is larger than the sum of its proper divisors (23219266009).

1221232213031 is an equidigital number, since it uses as much as digits as its factorization.

1221232213031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280585.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1221232213031 its reverse (1303122321221), we get a palindrome (2524354534252).

The spelling of 1221232213031 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-two million, two hundred thirteen thousand, thirty-one".