1211506455043 has 8 divisors (see below), whose sum is σ = 1216306256688. Its totient is φ = 1206707318784.

The previous prime is 1211506455041. The next prime is 1211506455083. The reversal of 1211506455043 is 3405546051121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211506455043 - 2¹ = 1211506455041 is a prime.

It is a super-2 number, since 2×1211506455043² (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 = 1211506454993 and 1211506455011.

It is not an unprimeable number, because it can be changed into a prime (1211506455041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3655855 + ... + 3973447.

It is an arithmetic number, because the mean of its divisors is an integer number (152038282086).

Almost surely, 2^{1211506455043} is an apocalyptic number.

1211506455043 is a deficient number, since it is larger than the sum of its proper divisors (4799801645).

1211506455043 is a wasteful number, since it uses less digits than its factorization.

1211506455043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332693.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 1211506455043 in words is "one trillion, two hundred eleven billion, five hundred six million, four hundred fifty-five thousand, forty-three".