1221323030031 has 8 divisors (see below), whose sum is σ = 1753694607280. Its totient is φ = 751583403072.

The previous prime is 1221323029999. The next prime is 1221323030051. The reversal of 1221323030031 is 1300303231221.

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

It is not a de Polignac number, because 1221323030031 - 2⁵ = 1221323029999 is a prime.

It is a super-2 number, since 2×1221323030031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221323030051) 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, 15657987526 + ... + 15657987603.

It is an arithmetic number, because the mean of its divisors is an integer number (219211825910).

Almost surely, 2^{1221323030031} is an apocalyptic number.

1221323030031 is a deficient number, since it is larger than the sum of its proper divisors (532371577249).

1221323030031 is a wasteful number, since it uses less digits than its factorization.

1221323030031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31315975145.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1221323030031 its reverse (1300303231221), we get a palindrome (2521626261252).

The spelling of 1221323030031 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-three million, thirty thousand, thirty-one".