1211042104031 has 4 divisors (see below), whose sum is σ = 1211057646864. Its totient is φ = 1211026561200.

The previous prime is 1211042103949. The next prime is 1211042104081. The reversal of 1211042104031 is 1304012401121.

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 1211042104031 - 2¹⁸ = 1211041841887 is a prime.

It is a super-2 number, since 2×1211042104031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211042103994 and 1211042104012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211042104081) 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, 7653950 + ... + 7810571.

It is an arithmetic number, because the mean of its divisors is an integer number (302764411716).

Almost surely, 2^{1211042104031} is an apocalyptic number.

1211042104031 is a deficient number, since it is larger than the sum of its proper divisors (15542833).

1211042104031 is an equidigital number, since it uses as much as digits as its factorization.

1211042104031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15542832.

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

Adding to 1211042104031 its reverse (1304012401121), we get a palindrome (2515054505152).

The spelling of 1211042104031 in words is "one trillion, two hundred eleven billion, forty-two million, one hundred four thousand, thirty-one".