1212320141 has 4 divisors (see below), whose sum is σ = 1232868000. Its totient is φ = 1191772284.

The previous prime is 1212320129. The next prime is 1212320159. The reversal of 1212320141 is 1410232121.

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 1212320141 - 2⁶ = 1212320077 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 (1212320171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10273841 + ... + 10273958.

It is an arithmetic number, because the mean of its divisors is an integer number (308217000).

Almost surely, 2^1212320141 is an apocalyptic number.

It is an amenable number.

1212320141 is a deficient number, since it is larger than the sum of its proper divisors (20547859).

1212320141 is an equidigital number, since it uses as much as digits as its factorization.

1212320141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20547858.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1212320141 is about 34818.3879724493. The cubic root of 1212320141 is about 1066.2828893566.

Adding to 1212320141 its reverse (1410232121), we get a palindrome (2622552262).

The spelling of 1212320141 in words is "one billion, two hundred twelve million, three hundred twenty thousand, one hundred forty-one".