1221211100132 has 48 divisors (see below), whose sum is σ = 2289382751040. Its totient is φ = 568325486592.

The previous prime is 1221211100117. The next prime is 1221211100143. The reversal of 1221211100132 is 2310011121221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221211100132.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405383 + ... + 1614545.

It is an arithmetic number, because the mean of its divisors is an integer number (47695473980).

Almost surely, 2^{1221211100132} is an apocalyptic number.

It is an amenable number.

1221211100132 is a deficient number, since it is larger than the sum of its proper divisors (1068171650908).

1221211100132 is a wasteful number, since it uses less digits than its factorization.

1221211100132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209420 (or 1209418 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1221211100132 its reverse (2310011121221), we get a palindrome (3531222221353).

The spelling of 1221211100132 in words is "one trillion, two hundred twenty-one billion, two hundred eleven million, one hundred thousand, one hundred thirty-two".