1022122121 has 4 divisors (see below), whose sum is σ = 1032242244. Its totient is φ = 1012002000.

The previous prime is 1022122109. The next prime is 1022122181. The reversal of 1022122121 is 1212212201.

1022122121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 787419721 + 234702400 = 28061^2 + 15320^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022122121 - 2¹⁰ = 1022121097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022122096 and 1022122105.

It is not an unprimeable number, because it can be changed into a prime (1022122181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5059910 + ... + 5060111.

It is an arithmetic number, because the mean of its divisors is an integer number (258060561).

Almost surely, 2^1022122121 is an apocalyptic number.

It is an amenable number.

1022122121 is a deficient number, since it is larger than the sum of its proper divisors (10120123).

1022122121 is a wasteful number, since it uses less digits than its factorization.

1022122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10120122.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1022122121 is about 31970.6446760149. The cubic root of 1022122121 is about 1007.3203224542.

Adding to 1022122121 its reverse (1212212201), we get a palindrome (2234334322).

The spelling of 1022122121 in words is "one billion, twenty-two million, one hundred twenty-two thousand, one hundred twenty-one".