122215501 has 2 divisors, whose sum is σ = 122215502.
Its totient is φ = 122215500.
The previous prime is 122215493. The next prime is 122215517. The reversal of 122215501 is 105512221.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 113955625 + 8259876 = 10675^2 + 2874^2
It is an emirp because it is prime and its reverse (105512221) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 122215501 - 23 = 122215493 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (122215801) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61107750 + 61107751.
It is an arithmetic number, because the mean of its divisors is an integer number (61107751).
Almost surely, 2122215501 is an apocalyptic number.
It is an amenable number.
122215501 is a deficient number, since it is larger than the sum of its proper divisors (1).
122215501 is an equidigital number, since it uses as much as digits as its factorization.
122215501 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 200, while the sum is 19.
The square root of 122215501 is about 11055.1119849597.
Note that the first 3 decimals coincide.
The cubic root of 122215501 is about 496.2594205818.
Adding to 122215501 its reverse (105512221), we get a palindrome (227727722).
The spelling of 122215501 in words is "one hundred twenty-two million, two hundred fifteen thousand, five hundred one".