1011111021212 has 12 divisors (see below), whose sum is σ = 1769797434216. Its totient is φ = 505454611440.

The previous prime is 1011111021187. The next prime is 1011111021257. The reversal of 1011111021212 is 2121201111101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25202243 + ... + 25242330.

It is an arithmetic number, because the mean of its divisors is an integer number (147483119518).

Almost surely, 2^{1011111021212} is an apocalyptic number.

It is an amenable number.

1011111021212 is a deficient number, since it is larger than the sum of its proper divisors (758686413004).

1011111021212 is a wasteful number, since it uses less digits than its factorization.

1011111021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50449588 (or 50449586 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1011111021212 its reverse (2121201111101), we get a palindrome (3132312132313).

The spelling of 1011111021212 in words is "one trillion, eleven billion, one hundred eleven million, twenty-one thousand, two hundred twelve".