1211212032321 has 32 divisors (see below), whose sum is σ = 1716745334400. Its totient is φ = 758137121280.

The previous prime is 1211212032259. The next prime is 1211212032347. The reversal of 1211212032321 is 1232302121121.

It is not a de Polignac number, because 1211212032321 - 2⁷ = 1211212032193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211212032391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5725725 + ... + 5933493.

It is an arithmetic number, because the mean of its divisors is an integer number (53648291700).

Almost surely, 2^{1211212032321} is an apocalyptic number.

It is an amenable number.

1211212032321 is a deficient number, since it is larger than the sum of its proper divisors (505533302079).

1211212032321 is a wasteful number, since it uses less digits than its factorization.

1211212032321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209649.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1211212032321 its reverse (1232302121121), we get a palindrome (2443514153442).

The spelling of 1211212032321 in words is "one trillion, two hundred eleven billion, two hundred twelve million, thirty-two thousand, three hundred twenty-one".