1021011111212 has 24 divisors (see below), whose sum is σ = 1864504002816. Its totient is φ = 488296846928.

The previous prime is 1021011111181. The next prime is 1021011111223. The reversal of 1021011111212 is 2121111101201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4024553 + ... + 4270719.

It is an arithmetic number, because the mean of its divisors is an integer number (77687666784).

Almost surely, 2^{1021011111212} is an apocalyptic number.

It is an amenable number.

1021011111212 is a deficient number, since it is larger than the sum of its proper divisors (843492891604).

1021011111212 is a wasteful number, since it uses less digits than its factorization.

1021011111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291277 (or 291275 counting only the distinct ones).

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

Adding to 1021011111212 its reverse (2121111101201), we get a palindrome (3142122212413).

The spelling of 1021011111212 in words is "one trillion, twenty-one billion, eleven million, one hundred eleven thousand, two hundred twelve".