1021121112112 has 10 divisors (see below), whose sum is σ = 1978422154748. Its totient is φ = 510560556048.

The previous prime is 1021121112061. The next prime is 1021121112169. The reversal of 1021121112112 is 2112111211201.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 63820069507 = 1021121112112 / (1 + 0 + 2 + 1 + 1 + 2 + 1 + 1 + 1 + 2 + 1 + 1 + 2).

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 as a sum of consecutive naturals, namely, 31910034738 + ... + 31910034769.

Almost surely, 2^{1021121112112} is an apocalyptic number.

It is an amenable number.

1021121112112 is a deficient number, since it is larger than the sum of its proper divisors (957301042636).

1021121112112 is an equidigital number, since it uses as much as digits as its factorization.

1021121112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63820069515 (or 63820069509 counting only the distinct ones).

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

Adding to 1021121112112 its reverse (2112111211201), we get a palindrome (3133232323313).

The spelling of 1021121112112 in words is "one trillion, twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, one hundred twelve".