1242210480781 has 4 divisors (see below), whose sum is σ = 1242237237472. Its totient is φ = 1242183724092.

The previous prime is 1242210480691. The next prime is 1242210480799. The reversal of 1242210480781 is 1870840122421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242210480781 is a prime.

It is a super-2 number, since 2×1242210480781² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242210430781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13308585 + ... + 13401598.

It is an arithmetic number, because the mean of its divisors is an integer number (310559309368).

Almost surely, 2^{1242210480781} is an apocalyptic number.

It is an amenable number.

1242210480781 is a deficient number, since it is larger than the sum of its proper divisors (26756691).

1242210480781 is an equidigital number, since it uses as much as digits as its factorization.

1242210480781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26756690.

The product of its (nonzero) digits is 57344, while the sum is 40.

The spelling of 1242210480781 in words is "one trillion, two hundred forty-two billion, two hundred ten million, four hundred eighty thousand, seven hundred eighty-one".