11121211012 has 12 divisors (see below), whose sum is σ = 19469408140. Its totient is φ = 5558522976.

The previous prime is 11121210979. The next prime is 11121211019. The reversal of 11121211012 is 21011212111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2015471236 + 9105739776 = 44894^2 + 95424^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11121210983 and 11121211001.

It is not an unprimeable number, because it can be changed into a prime (11121211019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508587 + ... + 530002.

Almost surely, 2^11121211012 is an apocalyptic number.

It is an amenable number.

11121211012 is a deficient number, since it is larger than the sum of its proper divisors (8348197128).

11121211012 is a wasteful number, since it uses less digits than its factorization.

11121211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041270 (or 1041268 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11121211012 its reverse (21011212111), we get a palindrome (32132423123).

The spelling of 11121211012 in words is "eleven billion, one hundred twenty-one million, two hundred eleven thousand, twelve".