1212423220000 has 60 divisors (see below), whose sum is σ = 2982743033886. Its totient is φ = 484969280000.

The previous prime is 1212423219947. The next prime is 1212423220003. The reversal of 1212423220000 is 223242121.

It can be written as a sum of positive squares in 5 ways, for example, as 3399822864 + 1209023397136 = 58308^2 + 1099556^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212423220000.

It is not an unprimeable number, because it can be changed into a prime (1212423220003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 30290581 + ... + 30330580.

Almost surely, 2^{1212423220000} is an apocalyptic number.

1212423220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212423220000 is an abundant number, since it is smaller than the sum of its proper divisors (1770319813886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212423220000 is an frugal number, since it uses more digits than its factorization.

1212423220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60621191 (or 60621168 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 1212423220000 its reverse (223242121), we get a palindrome (1212646462121).

The spelling of 1212423220000 in words is "one trillion, two hundred twelve billion, four hundred twenty-three million, two hundred twenty thousand".