111112121021012 has 24 divisors (see below), whose sum is σ = 198301733432712. Its totient is φ = 54456458825600.

The previous prime is 111112121020987. The next prime is 111112121021047. The reversal of 111112121021012 is 210120121211111.

It can be written as a sum of positive squares in 4 ways, for example, as 27775050201616 + 83337070819396 = 5270204^2 + 9128914^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246765539 + ... + 247215402.

It is an arithmetic number, because the mean of its divisors is an integer number (8262572226363).

Almost surely, 2^{111112121021012} is an apocalyptic number.

It is an amenable number.

111112121021012 is a deficient number, since it is larger than the sum of its proper divisors (87189612411700).

111112121021012 is a wasteful number, since it uses less digits than its factorization.

111112121021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493982059 (or 493982057 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111112121021012 its reverse (210120121211111), we get a palindrome (321232242232123).

The spelling of 111112121021012 in words is "one hundred eleven trillion, one hundred twelve billion, one hundred twenty-one million, twenty-one thousand, twelve".