155064110221 has 4 divisors (see below), whose sum is σ = 163225379200. Its totient is φ = 146902841244.

The previous prime is 155064110213. The next prime is 155064110239. The reversal of 155064110221 is 122011460551.

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 a cyclic number.

It is not a de Polignac number, because 155064110221 - 2³ = 155064110213 is a prime.

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 155064110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155064110291) 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, 4080634461 + ... + 4080634498.

It is an arithmetic number, because the mean of its divisors is an integer number (40806344800).

Almost surely, 2^155064110221 is an apocalyptic number.

It is an amenable number.

155064110221 is a deficient number, since it is larger than the sum of its proper divisors (8161268979).

155064110221 is an equidigital number, since it uses as much as digits as its factorization.

155064110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8161268978.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 155064110221 its reverse (122011460551), we get a palindrome (277075570772).

The spelling of 155064110221 in words is "one hundred fifty-five billion, sixty-four million, one hundred ten thousand, two hundred twenty-one".