1211001443042 has 32 divisors (see below), whose sum is σ = 1942082714880. Its totient is φ = 564940442880.

The previous prime is 1211001443009. The next prime is 1211001443077. The reversal of 1211001443042 is 2403441001121.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 1211001442999 and 1211001443017.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10274798 + ... + 10391990.

It is an arithmetic number, because the mean of its divisors is an integer number (60690084840).

Almost surely, 2^{1211001443042} is an apocalyptic number.

1211001443042 is a deficient number, since it is larger than the sum of its proper divisors (731081271838).

1211001443042 is a wasteful number, since it uses less digits than its factorization.

1211001443042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122738.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1211001443042 its reverse (2403441001121), we get a palindrome (3614442444163).

The spelling of 1211001443042 in words is "one trillion, two hundred eleven billion, one million, four hundred forty-three thousand, forty-two".