1022211022221 has 12 divisors (see below), whose sum is σ = 1476557583072. Its totient is φ = 681459914376.

The previous prime is 1022211022199. The next prime is 1022211022229. The reversal of 1022211022221 is 1222201122201.

It is a happy number.

It is not a de Polignac number, because 1022211022221 - 2²⁵ = 1022177467789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1022211022194 and 1022211022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022211022229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 706051 + ... + 1594656.

It is an arithmetic number, because the mean of its divisors is an integer number (123046465256).

Almost surely, 2^{1022211022221} is an apocalyptic number.

It is an amenable number.

1022211022221 is a deficient number, since it is larger than the sum of its proper divisors (454346560851).

1022211022221 is a wasteful number, since it uses less digits than its factorization.

1022211022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350080 (or 2350077 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1022211022221 its reverse (1222201122201), we get a palindrome (2244412144422).

The spelling of 1022211022221 in words is "one trillion, twenty-two billion, two hundred eleven million, twenty-two thousand, two hundred twenty-one".