1021210122222 has 24 divisors (see below), whose sum is σ = 2212643697264. Its totient is φ = 340400025504.

The previous prime is 1021210122199. The next prime is 1021210122253. The reversal of 1021210122222 is 2222210121201.

It is a happy number.

It is a super-2 number, since 2×1021210122222² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1021210122195 and 1021210122204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2193903 + ... + 2618325.

It is an arithmetic number, because the mean of its divisors is an integer number (92193487386).

Almost surely, 2^{1021210122222} is an apocalyptic number.

1021210122222 is an abundant number, since it is smaller than the sum of its proper divisors (1191433575042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021210122222 is a wasteful number, since it uses less digits than its factorization.

1021210122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558104 (or 558101 counting only the distinct ones).

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

Adding to 1021210122222 its reverse (2222210121201), we get a palindrome (3243420243423).

The spelling of 1021210122222 in words is "one trillion, twenty-one billion, two hundred ten million, one hundred twenty-two thousand, two hundred twenty-two".