1201131231012 has 36 divisors (see below), whose sum is σ = 3067493799916. Its totient is φ = 396249477120.

The previous prime is 1201131231011. The next prime is 1201131231029. The reversal of 1201131231012 is 2101321311021.

1201131231012 is a `hidden beast` number, since 1 + 20 + 11 + 312 + 310 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 791359693056 + 409771537956 = 889584^2 + 640134^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1201131231012² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1201131231011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171979789 + ... + 171986772.

Almost surely, 2^{1201131231012} is an apocalyptic number.

1201131231012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1201131231012 is an abundant number, since it is smaller than the sum of its proper divisors (1866362568904).

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

1201131231012 is a wasteful number, since it uses less digits than its factorization.

1201131231012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343966668 (or 343966663 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1201131231012 its reverse (2101321311021), we get a palindrome (3302452542033).

The spelling of 1201131231012 in words is "one trillion, two hundred one billion, one hundred thirty-one million, two hundred thirty-one thousand, twelve".