111220021012 has 6 divisors (see below), whose sum is σ = 194635036778. Its totient is φ = 55610010504.

The previous prime is 111220020943. The next prime is 111220021021. The reversal of 111220021012 is 210120022111.

It can be written as a sum of positive squares in only one way, i.e., 93155585796 + 18064435216 = 305214^2 + 134404^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111220020983 and 111220021001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13902502623 + ... + 13902502630.

Almost surely, 2^111220021012 is an apocalyptic number.

It is an amenable number.

111220021012 is a deficient number, since it is larger than the sum of its proper divisors (83415015766).

111220021012 is a wasteful number, since it uses less digits than its factorization.

111220021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27805005257 (or 27805005255 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111220021012 its reverse (210120022111), we get a palindrome (321340043123).

The spelling of 111220021012 in words is "one hundred eleven billion, two hundred twenty million, twenty-one thousand, twelve".