1221213434031 has 6 divisors (see below), whose sum is σ = 1763974960280. Its totient is φ = 814142289348.

The previous prime is 1221213433987. The next prime is 1221213434131. The reversal of 1221213434031 is 1304343121221.

1221213434031 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 213 + 43 + 403 + 1 = 666.

It is not a de Polignac number, because 1221213434031 - 2⁷ = 1221213433903 is a prime.

It is a super-2 number, since 2×1221213434031² (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 = 1221213433986 and 1221213434004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221213434131) 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 5 ways as a sum of consecutive naturals, for example, 67845190771 + ... + 67845190788.

Almost surely, 2^{1221213434031} is an apocalyptic number.

1221213434031 is a deficient number, since it is larger than the sum of its proper divisors (542761526249).

1221213434031 is a wasteful number, since it uses less digits than its factorization.

1221213434031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135690381565 (or 135690381562 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 1221213434031 its reverse (1304343121221), we get a palindrome (2525556555252).

The spelling of 1221213434031 in words is "one trillion, two hundred twenty-one billion, two hundred thirteen million, four hundred thirty-four thousand, thirty-one".