1022112121 has 4 divisors (see below), whose sum is σ = 1022638500. Its totient is φ = 1021585744.

The previous prime is 1022112109. The next prime is 1022112127. The reversal of 1022112121 is 1212112201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 485541225 + 536570896 = 22035^2 + 23164^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022112121 - 2²¹ = 1020014969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1022112127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260266 + ... + 264163.

It is an arithmetic number, because the mean of its divisors is an integer number (255659625).

Almost surely, 2^1022112121 is an apocalyptic number.

It is an amenable number.

1022112121 is a deficient number, since it is larger than the sum of its proper divisors (526379).

1022112121 is an equidigital number, since it uses as much as digits as its factorization.

1022112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526378.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1022112121 is about 31970.4882821642. The cubic root of 1022112121 is about 1007.3170373816.

Adding to 1022112121 its reverse (1212112201), we get a palindrome (2234224322).

The spelling of 1022112121 in words is "one billion, twenty-two million, one hundred twelve thousand, one hundred twenty-one".