1212010232221 has 4 divisors (see below), whose sum is σ = 1229080798944. Its totient is φ = 1194939665500.

The previous prime is 1212010232183. The next prime is 1212010232227. The reversal of 1212010232221 is 1222320102121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1212010232221 - 2⁹ = 1212010231709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212010232227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8535283255 + ... + 8535283396.

It is an arithmetic number, because the mean of its divisors is an integer number (307270199736).

Almost surely, 2^{1212010232221} is an apocalyptic number.

It is an amenable number.

1212010232221 is a deficient number, since it is larger than the sum of its proper divisors (17070566723).

1212010232221 is an equidigital number, since it uses as much as digits as its factorization.

1212010232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17070566722.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1212010232221 its reverse (1222320102121), we get a palindrome (2434330334342).

The spelling of 1212010232221 in words is "one trillion, two hundred twelve billion, ten million, two hundred thirty-two thousand, two hundred twenty-one".