1244221667777 has 4 divisors (see below), whose sum is σ = 1357332728496. Its totient is φ = 1131110607060.

The previous prime is 1244221667729. The next prime is 1244221667809. The reversal of 1244221667777 is 7777661224421.

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 not a de Polignac number, because 1244221667777 - 2²⁸ = 1243953232321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244221667477) 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, 56555530343 + ... + 56555530364.

It is an arithmetic number, because the mean of its divisors is an integer number (339333182124).

Almost surely, 2^{1244221667777} is an apocalyptic number.

It is an amenable number.

1244221667777 is a deficient number, since it is larger than the sum of its proper divisors (113111060719).

1244221667777 is a wasteful number, since it uses less digits than its factorization.

1244221667777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113111060718.

The product of its digits is 11063808, while the sum is 56.

The spelling of 1244221667777 in words is "one trillion, two hundred forty-four billion, two hundred twenty-one million, six hundred sixty-seven thousand, seven hundred seventy-seven".