1212505540544 has 28 divisors (see below), whose sum is σ = 2406354242400. Its totient is φ = 606180062208.

The previous prime is 1212505540523. The next prime is 1212505540591. The reversal of 1212505540544 is 4450455052121.

It is a junction number, because it is equal to n+sod(n) for n = 1212505540498 and 1212505540507.

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, 596264 + ... + 1667495.

Almost surely, 2^{1212505540544} is an apocalyptic number.

It is an amenable number.

1212505540544 is a deficient number, since it is larger than the sum of its proper divisors (1193848701856).

1212505540544 is an equidigital number, since it uses as much as digits as its factorization.

1212505540544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272140 (or 2272130 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 38.

The spelling of 1212505540544 in words is "one trillion, two hundred twelve billion, five hundred five million, five hundred forty thousand, five hundred forty-four".