1227401814721 has 4 divisors (see below), whose sum is σ = 1227731145472. Its totient is φ = 1227072483972.

The previous prime is 1227401814677. The next prime is 1227401814787. The reversal of 1227401814721 is 1274181047221.

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 1227401814721 - 2¹³ = 1227401806529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1227401814421) 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, 164659785 + ... + 164667238.

It is an arithmetic number, because the mean of its divisors is an integer number (306932786368).

Almost surely, 2^{1227401814721} is an apocalyptic number.

It is an amenable number.

1227401814721 is a deficient number, since it is larger than the sum of its proper divisors (329330751).

1227401814721 is an equidigital number, since it uses as much as digits as its factorization.

1227401814721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329330750.

The product of its (nonzero) digits is 50176, while the sum is 40.

The spelling of 1227401814721 in words is "one trillion, two hundred twenty-seven billion, four hundred one million, eight hundred fourteen thousand, seven hundred twenty-one".