36146145125221 has 6 divisors (see below), whose sum is σ = 36179307889766. Its totient is φ = 36113012730600.

The previous prime is 36146145125099. The next prime is 36146145125227. The reversal of 36146145125221 is 12252154164163.

It can be written as a sum of positive squares in only one way, i.e., 25504913957121 + 10641231168100 = 5050239^2 + 3262090^2 .

It is not a de Polignac number, because 36146145125221 - 2¹³ = 36146145117029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36146145125227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13993590 + ... + 16374151.

Almost surely, 2^{36146145125221} is an apocalyptic number.

It is an amenable number.

36146145125221 is a deficient number, since it is larger than the sum of its proper divisors (33162764545).

36146145125221 is an frugal number, since it uses more digits than its factorization.

36146145125221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30369923 (or 30368832 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

Adding to 36146145125221 its reverse (12252154164163), we get a palindrome (48398299289384).

The spelling of 36146145125221 in words is "thirty-six trillion, one hundred forty-six billion, one hundred forty-five million, one hundred twenty-five thousand, two hundred twenty-one".