1022211121 has 2 divisors, whose sum is σ = 1022211122. Its totient is φ = 1022211120.

The previous prime is 1022211109. The next prime is 1022211137. The reversal of 1022211121 is 1211122201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1021505521 + 705600 = 31961^2 + 840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022211121 - 2⁵ = 1022211089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1022211821) 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 as a sum of consecutive naturals, namely, 511105560 + 511105561.

It is an arithmetic number, because the mean of its divisors is an integer number (511105561).

Almost surely, 2^1022211121 is an apocalyptic number.

It is an amenable number.

1022211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022211121 is an equidigital number, since it uses as much as digits as its factorization.

1022211121 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1022211121 is about 31972.0365475833. The cubic root of 1022211121 is about 1007.3495586563.

Adding to 1022211121 its reverse (1211122201), we get a palindrome (2233333322).

The spelling of 1022211121 in words is "one billion, twenty-two million, two hundred eleven thousand, one hundred twenty-one".