1011222001 has 2 divisors, whose sum is σ = 1011222002. Its totient is φ = 1011222000.

The previous prime is 1011221987. The next prime is 1011222031. The reversal of 1011222001 is 1002221101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1002672225 + 8549776 = 31665^2 + 2924^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011222001 - 2¹³ = 1011213809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011222031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505611000 + 505611001.

It is an arithmetic number, because the mean of its divisors is an integer number (505611001).

Almost surely, 2^1011222001 is an apocalyptic number.

It is an amenable number.

1011222001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011222001 is an equidigital number, since it uses as much as digits as its factorization.

1011222001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1011222001 is about 31799.7169955960. The cubic root of 1011222001 is about 1003.7267609991.

Adding to 1011222001 its reverse (1002221101), we get a palindrome (2013443102).

The spelling of 1011222001 in words is "one billion, eleven million, two hundred twenty-two thousand, one".