1221431303411 has 8 divisors (see below), whose sum is σ = 1332638488944. Its totient is φ = 1110252113920.

The previous prime is 1221431303333. The next prime is 1221431303429. The reversal of 1221431303411 is 1143031341221.

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 1221431303411 - 2²² = 1221427109107 is a prime.

It is a super-3 number, since 3×1221431303411³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221431302411) 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, 6907730 + ... + 7082343.

It is an arithmetic number, because the mean of its divisors is an integer number (166579811118).

Almost surely, 2^{1221431303411} is an apocalyptic number.

1221431303411 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1221431303411 is a deficient number, since it is larger than the sum of its proper divisors (111207185533).

1221431303411 is a wasteful number, since it uses less digits than its factorization.

1221431303411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13998021.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 1221431303411 its reverse (1143031341221), we get a palindrome (2364462644632).

The spelling of 1221431303411 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-one million, three hundred three thousand, four hundred eleven".