7121111212 has 6 divisors (see below), whose sum is σ = 12461944628. Its totient is φ = 3560555604.

The previous prime is 7121111203. The next prime is 7121111287. The reversal of 7121111212 is 2121111217.

It is a super-3 number, since 3×7121111212³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7121111212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 890138898 + ... + 890138905.

Almost surely, 2^7121111212 is an apocalyptic number.

It is an amenable number.

7121111212 is a deficient number, since it is larger than the sum of its proper divisors (5340833416).

7121111212 is a wasteful number, since it uses less digits than its factorization.

7121111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780277807 (or 1780277805 counting only the distinct ones).

The product of its digits is 56, while the sum is 19.

The square root of 7121111212 is about 84386.6767446141. The cubic root of 7121111212 is about 1923.9004199394.

Adding to 7121111212 its reverse (2121111217), we get a palindrome (9242222429).

The spelling of 7121111212 in words is "seven billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twelve".