1212232140109 has 4 divisors (see below), whose sum is σ = 1212608496060. Its totient is φ = 1211855784160.

The previous prime is 1212232140107. The next prime is 1212232140121. The reversal of 1212232140109 is 9010412322121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 812561622084 + 399670518025 = 901422^2 + 632195^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212232140109 - 2¹ = 1212232140107 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 (1212232140107) 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, 188173144 + ... + 188179585.

It is an arithmetic number, because the mean of its divisors is an integer number (303152124015).

Almost surely, 2^{1212232140109} is an apocalyptic number.

It is an amenable number.

1212232140109 is a deficient number, since it is larger than the sum of its proper divisors (376355951).

1212232140109 is an equidigital number, since it uses as much as digits as its factorization.

1212232140109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376355950.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 1212232140109 in words is "one trillion, two hundred twelve billion, two hundred thirty-two million, one hundred forty thousand, one hundred nine".