1211031201242 has 8 divisors (see below), whose sum is σ = 1827047072916. Its totient is φ = 602015510272.

The previous prime is 1211031201229. The next prime is 1211031201257. The reversal of 1211031201242 is 2421021301121.

It can be written as a sum of positive squares in 2 ways, for example, as 1209584235721 + 1446965521 = 1099811^2 + 38039^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1750044743 + ... + 1750045434.

Almost surely, 2^{1211031201242} is an apocalyptic number.

1211031201242 is a deficient number, since it is larger than the sum of its proper divisors (616015871674).

1211031201242 is a wasteful number, since it uses less digits than its factorization.

1211031201242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500090352.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1211031201242 its reverse (2421021301121), we get a palindrome (3632052502363).

The spelling of 1211031201242 in words is "one trillion, two hundred eleven billion, thirty-one million, two hundred one thousand, two hundred forty-two".