1213450501 has 2 divisors, whose sum is σ = 1213450502. Its totient is φ = 1213450500.

The previous prime is 1213450499. The next prime is 1213450517. The reversal of 1213450501 is 1050543121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1211109601 + 2340900 = 34801^2 + 1530^2 .

It is an emirp because it is prime and its reverse (1050543121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213450501 - 2¹ = 1213450499 is a prime.

Together with 1213450499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213450001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606725250 + 606725251.

It is an arithmetic number, because the mean of its divisors is an integer number (606725251).

Almost surely, 2^1213450501 is an apocalyptic number.

It is an amenable number.

1213450501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213450501 is an equidigital number, since it uses as much as digits as its factorization.

1213450501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1213450501 is about 34834.6164181551. The cubic root of 1213450501 is about 1066.6141849938.

Adding to 1213450501 its reverse (1050543121), we get a palindrome (2263993622).

The spelling of 1213450501 in words is "one billion, two hundred thirteen million, four hundred fifty thousand, five hundred one".