1211362231481 has 4 divisors (see below), whose sum is σ = 1211614656000. Its totient is φ = 1211109806964.

The previous prime is 1211362231477. The next prime is 1211362231493. The reversal of 1211362231481 is 1841322631121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1211362231481 - 2² = 1211362231477 is a prime.

It is a super-2 number, since 2×1211362231481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211362431481) 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 3 ways as a sum of consecutive naturals, for example, 126205061 + ... + 126214658.

It is an arithmetic number, because the mean of its divisors is an integer number (302903664000).

Almost surely, 2^{1211362231481} is an apocalyptic number.

It is an amenable number.

1211362231481 is a deficient number, since it is larger than the sum of its proper divisors (252424519).

1211362231481 is an equidigital number, since it uses as much as digits as its factorization.

1211362231481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252424518.

The product of its digits is 13824, while the sum is 35.

The spelling of 1211362231481 in words is "one trillion, two hundred eleven billion, three hundred sixty-two million, two hundred thirty-one thousand, four hundred eighty-one".