1011131221212 has 72 divisors (see below), whose sum is σ = 2921251788000. Its totient is φ = 288874257408.

The previous prime is 1011131221171. The next prime is 1011131221213. The reversal of 1011131221212 is 2121221311101.

It is a happy number.

1011131221212 is a `hidden beast` number, since 10 + 111 + 312 + 21 + 212 = 666.

1011131221212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011131221213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3638164 + ... + 3906212.

It is an arithmetic number, because the mean of its divisors is an integer number (40572941500).

Almost surely, 2^{1011131221212} is an apocalyptic number.

1011131221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1011131221212 is an abundant number, since it is smaller than the sum of its proper divisors (1910120566788).

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

1011131221212 is a wasteful number, since it uses less digits than its factorization.

1011131221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283035 (or 283030 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1011131221212 its reverse (2121221311101), we get a palindrome (3132352532313).

The spelling of 1011131221212 in words is "one trillion, eleven billion, one hundred thirty-one million, two hundred twenty-one thousand, two hundred twelve".