1211212012 has 24 divisors (see below), whose sum is σ = 2136544256. Its totient is φ = 600790608.

The previous prime is 1211211979. The next prime is 1211212063. The reversal of 1211212012 is 2102121121.

It is a junction number, because it is equal to n+sod(n) for n = 1211211983 and 1211212001.

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, 271633 + ... + 276055.

Almost surely, 2^1211212012 is an apocalyptic number.

It is an amenable number.

1211212012 is a deficient number, since it is larger than the sum of its proper divisors (925332244).

1211212012 is a wasteful number, since it uses less digits than its factorization.

1211212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4957 (or 4955 counting only the distinct ones).

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

The square root of 1211212012 is about 34802.4713490292. The cubic root of 1211212012 is about 1065.9579094153.

Adding to 1211212012 its reverse (2102121121), we get a palindrome (3313333133).

The spelling of 1211212012 in words is "one billion, two hundred eleven million, two hundred twelve thousand, twelve".