1221233421031 has 8 divisors (see below), whose sum is σ = 1334803923824. Its totient is φ = 1110467128320.

The previous prime is 1221233421013. The next prime is 1221233421053. The reversal of 1221233421031 is 1301243321221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221233421031 - 2¹¹ = 1221233418983 is a prime.

It is a super-2 number, since 2×1221233421031² (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 = 1221233420987 and 1221233421005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221233421011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701051610 + ... + 701053351.

It is an arithmetic number, because the mean of its divisors is an integer number (166850490478).

Almost surely, 2^{1221233421031} is an apocalyptic number.

1221233421031 is a deficient number, since it is larger than the sum of its proper divisors (113570502793).

1221233421031 is a wasteful number, since it uses less digits than its factorization.

1221233421031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402105041.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1221233421031 its reverse (1301243321221), we get a palindrome (2522476742252).

The spelling of 1221233421031 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-three million, four hundred twenty-one thousand, thirty-one".