1211454723755 has 4 divisors (see below), whose sum is σ = 1453745668512. Its totient is φ = 969163779000.

The previous prime is 1211454723697. The next prime is 1211454723761. The reversal of 1211454723755 is 5573274541121.

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

It is not a de Polignac number, because 1211454723755 - 2⁶ = 1211454723691 is a prime.

It is a super-3 number, since 3×1211454723755³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121145472371 + ... + 121145472380.

It is an arithmetic number, because the mean of its divisors is an integer number (363436417128).

Almost surely, 2^{1211454723755} is an apocalyptic number.

1211454723755 is a deficient number, since it is larger than the sum of its proper divisors (242290944757).

1211454723755 is an equidigital number, since it uses as much as digits as its factorization.

1211454723755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242290944756.

The product of its digits is 1176000, while the sum is 47.

The spelling of 1211454723755 in words is "one trillion, two hundred eleven billion, four hundred fifty-four million, seven hundred twenty-three thousand, seven hundred fifty-five".