7121123377 has 4 divisors (see below), whose sum is σ = 7125669376. Its totient is φ = 7116577380.

The previous prime is 7121123327. The next prime is 7121123381. The reversal of 7121123377 is 7733211217.

It is a happy number.

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 7121123377 - 2¹⁹ = 7120599089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7121123327) 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, 2270649 + ... + 2273782.

It is an arithmetic number, because the mean of its divisors is an integer number (1781417344).

Almost surely, 2^7121123377 is an apocalyptic number.

It is an amenable number.

7121123377 is a deficient number, since it is larger than the sum of its proper divisors (4545999).

7121123377 is a wasteful number, since it uses less digits than its factorization.

7121123377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545998.

The product of its digits is 12348, while the sum is 34.

The square root of 7121123377 is about 84386.7488234972. The cubic root of 7121123377 is about 1923.9015154723.

The spelling of 7121123377 in words is "seven billion, one hundred twenty-one million, one hundred twenty-three thousand, three hundred seventy-seven".