1377117221 has 8 divisors (see below), whose sum is σ = 1382296320. Its totient is φ = 1371946608.

The previous prime is 1377117211. The next prime is 1377117223. The reversal of 1377117221 is 1227117731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1377117221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377117223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688595 + ... + 690591.

It is an arithmetic number, because the mean of its divisors is an integer number (172787040).

Almost surely, 2^1377117221 is an apocalyptic number.

It is an amenable number.

1377117221 is a deficient number, since it is larger than the sum of its proper divisors (5179099).

1377117221 is a wasteful number, since it uses less digits than its factorization.

1377117221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4243.

The product of its digits is 4116, while the sum is 32.

The square root of 1377117221 is about 37109.5300563076. The cubic root of 1377117221 is about 1112.5604989361.

The spelling of 1377117221 in words is "one billion, three hundred seventy-seven million, one hundred seventeen thousand, two hundred twenty-one".