136423543221201 has 4 divisors (see below), whose sum is σ = 181898057628272. Its totient is φ = 90949028814132.

The previous prime is 136423543221197. The next prime is 136423543221211. The reversal of 136423543221201 is 102122345324631.

It is a happy number.

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.

It is not a de Polignac number, because 136423543221201 - 2² = 136423543221197 is a prime.

It is a super-2 number, since 2×136423543221201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136423543221201.

It is not an unprimeable number, because it can be changed into a prime (136423543221211) 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, 22737257203531 + ... + 22737257203536.

It is an arithmetic number, because the mean of its divisors is an integer number (45474514407068).

Almost surely, 2^{136423543221201} is an apocalyptic number.

It is an amenable number.

136423543221201 is a deficient number, since it is larger than the sum of its proper divisors (45474514407071).

136423543221201 is an equidigital number, since it uses as much as digits as its factorization.

136423543221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45474514407070.

The product of its (nonzero) digits is 207360, while the sum is 39.

Adding to 136423543221201 its reverse (102122345324631), we get a palindrome (238545888545832).

The spelling of 136423543221201 in words is "one hundred thirty-six trillion, four hundred twenty-three billion, five hundred forty-three million, two hundred twenty-one thousand, two hundred one".