1021122212111 has 8 divisors (see below), whose sum is σ = 1043236454400. Its totient is φ = 999024146488.

The previous prime is 1021122212081. The next prime is 1021122212113. The reversal of 1021122212111 is 1112122211201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021122212111 - 2³⁴ = 1003942342927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021122212111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021122212113) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3916511 + ... + 4169088.

It is an arithmetic number, because the mean of its divisors is an integer number (130404556800).

Almost surely, 2^{1021122212111} is an apocalyptic number.

1021122212111 is a deficient number, since it is larger than the sum of its proper divisors (22114242289).

1021122212111 is an equidigital number, since it uses as much as digits as its factorization.

1021122212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8088333.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1021122212111 its reverse (1112122211201), we get a palindrome (2133244423312).

The spelling of 1021122212111 in words is "one trillion, twenty-one billion, one hundred twenty-two million, two hundred twelve thousand, one hundred eleven".