1221513052031 has 8 divisors (see below), whose sum is σ = 1293403741344. Its totient is φ = 1149626471680.

The previous prime is 1221513052021. The next prime is 1221513052033. The reversal of 1221513052031 is 1302503151221.

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 1221513052031 - 2¹⁰ = 1221513051007 is a prime.

It is a super-2 number, since 2×1221513052031² (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 (1221513052033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404390 + ... + 1614483.

It is an arithmetic number, because the mean of its divisors is an integer number (161675467668).

Almost surely, 2^{1221513052031} is an apocalyptic number.

1221513052031 is a deficient number, since it is larger than the sum of its proper divisors (71890689313).

1221513052031 is a wasteful number, since it uses less digits than its factorization.

1221513052031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054481.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 1221513052031 in words is "one trillion, two hundred twenty-one billion, five hundred thirteen million, fifty-two thousand, thirty-one".