1021122122212 has 12 divisors (see below), whose sum is σ = 1786994105260. Its totient is φ = 510552377856.

The previous prime is 1021122122183. The next prime is 1021122122231. The reversal of 1021122122212 is 2122212211201.

It can be written as a sum of positive squares in 2 ways, for example, as 978663047076 + 42459075136 = 989274^2 + 206056^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1021122122212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1902537 + ... + 2379472.

Almost surely, 2^{1021122122212} is an apocalyptic number.

It is an amenable number.

1021122122212 is a deficient number, since it is larger than the sum of its proper divisors (765871983048).

1021122122212 is a wasteful number, since it uses less digits than its factorization.

1021122122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4341630 (or 4341628 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1021122122212 its reverse (2122212211201), we get a palindrome (3143334333413).

The spelling of 1021122122212 in words is "one trillion, twenty-one billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twelve".