1221112012 has 6 divisors (see below), whose sum is σ = 2136946028. Its totient is φ = 610556004.

The previous prime is 1221112003. The next prime is 1221112069. The reversal of 1221112012 is 2102111221.

It is a super-2 number, since 2×1221112012² = 2982229091701376288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221111983 and 1221112001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152638998 + ... + 152639005.

Almost surely, 2^1221112012 is an apocalyptic number.

It is an amenable number.

1221112012 is a deficient number, since it is larger than the sum of its proper divisors (915834016).

1221112012 is a wasteful number, since it uses less digits than its factorization.

1221112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305278007 (or 305278005 counting only the distinct ones).

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

The square root of 1221112012 is about 34944.4131729237. The cubic root of 1221112012 is about 1068.8542812556.

Adding to 1221112012 its reverse (2102111221), we get a palindrome (3323223233).

The spelling of 1221112012 in words is "one billion, two hundred twenty-one million, one hundred twelve thousand, twelve".