1022211002221 has 4 divisors (see below), whose sum is σ = 1057459657500. Its totient is φ = 986962346944.

The previous prime is 1022211002179. The next prime is 1022211002251. The reversal of 1022211002221 is 1222001122201.

It is a happy number.

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 263245955625 + 758965046596 = 513075^2 + 871186^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022211002221 - 2⁷ = 1022211002093 is a prime.

It is a super-2 number, since 2×1022211002221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022211002195 and 1022211002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022211002251) 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, 17624327596 + ... + 17624327653.

It is an arithmetic number, because the mean of its divisors is an integer number (264364914375).

Almost surely, 2^{1022211002221} is an apocalyptic number.

It is an amenable number.

1022211002221 is a deficient number, since it is larger than the sum of its proper divisors (35248655279).

1022211002221 is an equidigital number, since it uses as much as digits as its factorization.

1022211002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35248655278.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1022211002221 its reverse (1222001122201), we get a palindrome (2244212124422).

The spelling of 1022211002221 in words is "one trillion, twenty-two billion, two hundred eleven million, two thousand, two hundred twenty-one".