1211432240211 has 4 divisors (see below), whose sum is σ = 1615242986952. Its totient is φ = 807621493472.

The previous prime is 1211432240101. The next prime is 1211432240219. The reversal of 1211432240211 is 1120422341121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211432240211 - 2¹⁰ = 1211432239187 is a prime.

It is a super-3 number, since 3×1211432240211³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211432240219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201905373366 + ... + 201905373371.

It is an arithmetic number, because the mean of its divisors is an integer number (403810746738).

Almost surely, 2^{1211432240211} is an apocalyptic number.

1211432240211 is a deficient number, since it is larger than the sum of its proper divisors (403810746741).

1211432240211 is an equidigital number, since it uses as much as digits as its factorization.

1211432240211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403810746740.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 1211432240211 its reverse (1120422341121), we get a palindrome (2331854581332).

The spelling of 1211432240211 in words is "one trillion, two hundred eleven billion, four hundred thirty-two million, two hundred forty thousand, two hundred eleven".