1021222112222 has 64 divisors (see below), whose sum is σ = 1694972139840. Its totient is φ = 458566272000.

The previous prime is 1021222112191. The next prime is 1021222112227. The reversal of 1021222112222 is 2222112221201.

It is a junction number, because it is equal to n+sod(n) for n = 1021222112194 and 1021222112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021222112227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205516154 + ... + 205521122.

It is an arithmetic number, because the mean of its divisors is an integer number (26483939685).

Almost surely, 2^{1021222112222} is an apocalyptic number.

1021222112222 is a deficient number, since it is larger than the sum of its proper divisors (673750027618).

1021222112222 is a wasteful number, since it uses less digits than its factorization.

1021222112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6429.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1021222112222 its reverse (2222112221201), we get a palindrome (3243334333423).

The spelling of 1021222112222 in words is "one trillion, twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twenty-two".