1221432200031 has 16 divisors (see below), whose sum is σ = 1746202406400. Its totient is φ = 756687704448.

The previous prime is 1221432200011. The next prime is 1221432200039. The reversal of 1221432200031 is 1300022341221.

It is not a de Polignac number, because 1221432200031 - 2¹³ = 1221432191839 is a prime.

It is a super-2 number, since 2×1221432200031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221432199980 and 1221432200007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221432200039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151576041 + ... + 151584098.

It is an arithmetic number, because the mean of its divisors is an integer number (109137650400).

Almost surely, 2^{1221432200031} is an apocalyptic number.

1221432200031 is a deficient number, since it is larger than the sum of its proper divisors (524770206369).

1221432200031 is a wasteful number, since it uses less digits than its factorization.

1221432200031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303160238.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1221432200031 its reverse (1300022341221), we get a palindrome (2521454541252).

The spelling of 1221432200031 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-two million, two hundred thousand, thirty-one".