1167622121 has 4 divisors (see below), whose sum is σ = 1167714192. Its totient is φ = 1167530052.

The previous prime is 1167622109. The next prime is 1167622123. The reversal of 1167622121 is 1212267611.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1212267611 = 557 ⋅2176423.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1167622121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1167622123) 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, 23255 + ... + 53628.

It is an arithmetic number, because the mean of its divisors is an integer number (291928548).

Almost surely, 2^1167622121 is an apocalyptic number.

It is an amenable number.

1167622121 is a deficient number, since it is larger than the sum of its proper divisors (92071).

1167622121 is an equidigital number, since it uses as much as digits as its factorization.

1167622121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92070.

The product of its digits is 2016, while the sum is 29.

The square root of 1167622121 is about 34170.4861100921. The cubic root of 1167622121 is about 1053.0139018200.

Adding to 1167622121 its reverse (1212267611), we get a palindrome (2379889732).

The spelling of 1167622121 in words is "one billion, one hundred sixty-seven million, six hundred twenty-two thousand, one hundred twenty-one".