1221000022232 has 32 divisors (see below), whose sum is σ = 2303975242800. Its totient is φ = 606614649984.

The previous prime is 1221000022211. The next prime is 1221000022241. The reversal of 1221000022232 is 2322200001221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221000022232.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 717119 + ... + 1719377.

Almost surely, 2^{1221000022232} is an apocalyptic number.

It is an amenable number.

1221000022232 is a deficient number, since it is larger than the sum of its proper divisors (1082975220568).

1221000022232 is a wasteful number, since it uses less digits than its factorization.

1221000022232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003235 (or 1003231 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 1221000022232 its reverse (2322200001221), we get a palindrome (3543200023453).

The spelling of 1221000022232 in words is "one trillion, two hundred twenty-one billion, twenty-two thousand, two hundred thirty-two".