1211140344031 has 32 divisors (see below), whose sum is σ = 1289559398400. Its totient is φ = 1135445472000.

The previous prime is 1211140343981. The next prime is 1211140344061. The reversal of 1211140344031 is 1304430411121.

It is not a de Polignac number, because 1211140344031 - 2¹⁷ = 1211140212959 is a prime.

It is a super-2 number, since 2×1211140344031² (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 = 1211140343987 and 1211140344005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211140344061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 502338216 + ... + 502340626.

It is an arithmetic number, because the mean of its divisors is an integer number (40298731200).

Almost surely, 2^{1211140344031} is an apocalyptic number.

1211140344031 is a deficient number, since it is larger than the sum of its proper divisors (78419054369).

1211140344031 is a wasteful number, since it uses less digits than its factorization.

1211140344031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4311.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 1211140344031 its reverse (1304430411121), we get a palindrome (2515570755152).

The spelling of 1211140344031 in words is "one trillion, two hundred eleven billion, one hundred forty million, three hundred forty-four thousand, thirty-one".