1022021101001 has 4 divisors (see below), whose sum is σ = 1023303436932. Its totient is φ = 1020738765072.

The previous prime is 1022021100977. The next prime is 1022021101009. The reversal of 1022021101001 is 1001011202201.

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 253854745600 + 768166355401 = 503840^2 + 876451^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022021101001 - 2²² = 1022016906697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1022021101009) 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 3 ways as a sum of consecutive naturals, for example, 641166770 + ... + 641168363.

It is an arithmetic number, because the mean of its divisors is an integer number (255825859233).

Almost surely, 2^{1022021101001} is an apocalyptic number.

It is an amenable number.

1022021101001 is a deficient number, since it is larger than the sum of its proper divisors (1282335931).

1022021101001 is an equidigital number, since it uses as much as digits as its factorization.

1022021101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282335930.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1022021101001 its reverse (1001011202201), we get a palindrome (2023032303202).

The spelling of 1022021101001 in words is "one trillion, twenty-two billion, twenty-one million, one hundred one thousand, one".