1011221111212 has 48 divisors (see below), whose sum is σ = 2040067411200. Its totient is φ = 434659210560.

The previous prime is 1011221111189. The next prime is 1011221111221. The reversal of 1011221111212 is 2121111221101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8615464 + ... + 8732047.

It is an arithmetic number, because the mean of its divisors is an integer number (42501404400).

Almost surely, 2^{1011221111212} is an apocalyptic number.

It is an amenable number.

1011221111212 is an abundant number, since it is smaller than the sum of its proper divisors (1028846299988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1011221111212 is a wasteful number, since it uses less digits than its factorization.

1011221111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17347606 (or 17347604 counting only the distinct ones).

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

Adding to 1011221111212 its reverse (2121111221101), we get a palindrome (3132332332313).

The spelling of 1011221111212 in words is "one trillion, eleven billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twelve".