1081311261372 has 48 divisors (see below), whose sum is σ = 2803734438400. Its totient is φ = 360394032240.

The previous prime is 1081311261367. The next prime is 1081311261377. The reversal of 1081311261372 is 2731621131801.

1081311261372 is a `hidden beast` number, since 1 + 0 + 8 + 1 + 31 + 1 + 2 + 613 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1081311261367) and next prime (1081311261377).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081311261377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316779 + ... + 1504317.

Almost surely, 2^{1081311261372} is an apocalyptic number.

1081311261372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1081311261372 is an abundant number, since it is smaller than the sum of its proper divisors (1722423177028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1081311261372 is a wasteful number, since it uses less digits than its factorization.

1081311261372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195983 (or 1195975 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 1081311261372 in words is "one trillion, eighty-one billion, three hundred eleven million, two hundred sixty-one thousand, three hundred seventy-two".