1211742331983 has 8 divisors (see below), whose sum is σ = 1795173825200. Its totient is φ = 807828221304.

The previous prime is 1211742331979. The next prime is 1211742331999. The reversal of 1211742331983 is 3891332471121.

1211742331983 is a `hidden beast` number, since 1 + 2 + 117 + 423 + 31 + 9 + 83 = 666.

It is not a de Polignac number, because 1211742331983 - 2² = 1211742331979 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 (1211742331903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22439672788 + ... + 22439672841.

It is an arithmetic number, because the mean of its divisors is an integer number (224396728150).

Almost surely, 2^{1211742331983} is an apocalyptic number.

1211742331983 is a deficient number, since it is larger than the sum of its proper divisors (583431493217).

1211742331983 is an equidigital number, since it uses as much as digits as its factorization.

1211742331983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44879345638 (or 44879345632 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 1211742331983 in words is "one trillion, two hundred eleven billion, seven hundred forty-two million, three hundred thirty-one thousand, nine hundred eighty-three".