164121131 has 2 divisors, whose sum is σ = 164121132. Its totient is φ = 164121130.

The previous prime is 164121103. The next prime is 164121163. The reversal of 164121131 is 131121461.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (131121461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164121131 is a prime.

It is a super-2 number, since 2×164121131² = 53871491281438322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164111131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82060565 + 82060566.

It is an arithmetic number, because the mean of its divisors is an integer number (82060566).

Almost surely, 2^164121131 is an apocalyptic number.

164121131 is a deficient number, since it is larger than the sum of its proper divisors (1).

164121131 is an equidigital number, since it uses as much as digits as its factorization.

164121131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 20.

The square root of 164121131 is about 12810.9769728932. The cubic root of 164121131 is about 547.5050975666.

Adding to 164121131 its reverse (131121461), we get a palindrome (295242592).

The spelling of 164121131 in words is "one hundred sixty-four million, one hundred twenty-one thousand, one hundred thirty-one".