1121377220401 has 3 divisors (see below), whose sum is σ = 1121378279353. Its totient is φ = 1121376161450.

The previous prime is 1121377220389. The next prime is 1121377220407. The reversal of 1121377220401 is 1040227731211.

It is a happy number.

The square root of 1121377220401 is 1058951.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1121377220401 - 2¹³ = 1121377212209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121377220407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 529476 + ... + 1588426.

Almost surely, 2^{1121377220401} is an apocalyptic number.

1121377220401 is the 1058951-st square number.

1121377220401 is the 529476-th centered octagonal number.

It is an amenable number.

1121377220401 is a deficient number, since it is larger than the sum of its proper divisors (1058952).

1121377220401 is an frugal number, since it uses more digits than its factorization.

1121377220401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117902 (or 1058951 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The spelling of 1121377220401 in words is "one trillion, one hundred twenty-one billion, three hundred seventy-seven million, two hundred twenty thousand, four hundred one".