1011222022221 has 6 divisors (see below), whose sum is σ = 1460654032110. Its totient is φ = 674148014808.

The previous prime is 1011222022147. The next prime is 1011222022229. The reversal of 1011222022221 is 1222202221101.

It is a happy number.

1011222022221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 792304713225 + 218917308996 = 890115^2 + 467886^2 .

It is not a de Polignac number, because 1011222022221 - 2¹⁴ = 1011222005837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011222022194 and 1011222022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011222022229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56179001226 + ... + 56179001243.

It is an arithmetic number, because the mean of its divisors is an integer number (243442338685).

Almost surely, 2^{1011222022221} is an apocalyptic number.

It is an amenable number.

1011222022221 is a deficient number, since it is larger than the sum of its proper divisors (449432009889).

1011222022221 is a wasteful number, since it uses less digits than its factorization.

1011222022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112358002475 (or 112358002472 counting only the distinct ones).

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

Adding to 1011222022221 its reverse (1222202221101), we get a palindrome (2233424243322).

The spelling of 1011222022221 in words is "one trillion, eleven billion, two hundred twenty-two million, twenty-two thousand, two hundred twenty-one".