1221859103132 has 12 divisors (see below), whose sum is σ = 2138271292080. Its totient is φ = 610924448256.

The previous prime is 1221859103119. The next prime is 1221859103141. The reversal of 1221859103132 is 2313019581221.

It is a congruent number.

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, 709157 + ... + 1716572.

It is an arithmetic number, because the mean of its divisors is an integer number (178189274340).

Almost surely, 2^{1221859103132} is an apocalyptic number.

It is an amenable number.

1221859103132 is a deficient number, since it is larger than the sum of its proper divisors (916412188948).

1221859103132 is a wasteful number, since it uses less digits than its factorization.

1221859103132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551660 (or 2551658 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 1221859103132 in words is "one trillion, two hundred twenty-one billion, eight hundred fifty-nine million, one hundred three thousand, one hundred thirty-two".