1221105240232 has 64 divisors (see below), whose sum is σ = 2427860407680. Its totient is φ = 574612211712.

The previous prime is 1221105240227. The next prime is 1221105240239. The reversal of 1221105240232 is 2320425011221.

It is a junction number, because it is equal to n+sod(n) for n = 1221105240197 and 1221105240206.

It is not an unprimeable number, because it can be changed into a prime (1221105240239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2634163 + ... + 3062845.

It is an arithmetic number, because the mean of its divisors is an integer number (37935318870).

Almost surely, 2^{1221105240232} is an apocalyptic number.

It is an amenable number.

1221105240232 is a deficient number, since it is larger than the sum of its proper divisors (1206755167448).

1221105240232 is a wasteful number, since it uses less digits than its factorization.

1221105240232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428962 (or 428958 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 1221105240232 in words is "one trillion, two hundred twenty-one billion, one hundred five million, two hundred forty thousand, two hundred thirty-two".