1242553212122 has 4 divisors (see below), whose sum is σ = 1863829818186. Its totient is φ = 621276606060.

The previous prime is 1242553211983. The next prime is 1242553212127. The reversal of 1242553212122 is 2212123552421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 982717325041 + 259835887081 = 991321^2 + 509741^2 .

It is not an unprimeable number, because it can be changed into a prime (1242553212127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310638303029 + ... + 310638303032.

Almost surely, 2^{1242553212122} is an apocalyptic number.

1242553212122 is a deficient number, since it is larger than the sum of its proper divisors (621276606064).

1242553212122 is an equidigital number, since it uses as much as digits as its factorization.

1242553212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621276606063.

The product of its digits is 19200, while the sum is 32.

Adding to 1242553212122 its reverse (2212123552421), we get a palindrome (3454676764543).

The spelling of 1242553212122 in words is "one trillion, two hundred forty-two billion, five hundred fifty-three million, two hundred twelve thousand, one hundred twenty-two".