1021011221222 has 16 divisors (see below), whose sum is σ = 1551534331392. Its totient is φ = 503868322440.

The previous prime is 1021011221207. The next prime is 1021011221231. The reversal of 1021011221222 is 2221221101201.

It is a super-2 number, since 2×1021011221222² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1021011221222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8744738 + ... + 8860725.

It is an arithmetic number, because the mean of its divisors is an integer number (96970895712).

Almost surely, 2^{1021011221222} is an apocalyptic number.

1021011221222 is a deficient number, since it is larger than the sum of its proper divisors (530523110170).

1021011221222 is a wasteful number, since it uses less digits than its factorization.

1021011221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17605843.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1021011221222 its reverse (2221221101201), we get a palindrome (3242232322423).

The spelling of 1021011221222 in words is "one trillion, twenty-one billion, eleven million, two hundred twenty-one thousand, two hundred twenty-two".