1022011020221 has 4 divisors (see below), whose sum is σ = 1022187204444. Its totient is φ = 1021834836000.

The previous prime is 1022011020211. The next prime is 1022011020229. The reversal of 1022011020221 is 1220201102201.

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 623490268996 + 398520751225 = 789614^2 + 631285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022011020221 is a prime.

It is a super-3 number, since 3×1022011020221³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022011020196 and 1022011020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022011020229) 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, 88083410 + ... + 88095011.

It is an arithmetic number, because the mean of its divisors is an integer number (255546801111).

Almost surely, 2^{1022011020221} is an apocalyptic number.

It is an amenable number.

1022011020221 is a deficient number, since it is larger than the sum of its proper divisors (176184223).

1022011020221 is an equidigital number, since it uses as much as digits as its factorization.

1022011020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176184222.

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

Adding to 1022011020221 its reverse (1220201102201), we get a palindrome (2242212122422).

The spelling of 1022011020221 in words is "one trillion, twenty-two billion, eleven million, twenty thousand, two hundred twenty-one".