1201010155 has 4 divisors (see below), whose sum is σ = 1441212192. Its totient is φ = 960808120.

The previous prime is 1201010149. The next prime is 1201010201. The reversal of 1201010155 is 5510101021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5510101021 = 13171 ⋅418351.

It is not a de Polignac number, because 1201010155 - 2⁵ = 1201010123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120101011 + ... + 120101020.

It is an arithmetic number, because the mean of its divisors is an integer number (360303048).

Almost surely, 2^1201010155 is an apocalyptic number.

1201010155 is a deficient number, since it is larger than the sum of its proper divisors (240202037).

1201010155 is an equidigital number, since it uses as much as digits as its factorization.

1201010155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240202036.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 1201010155 is about 34655.5934157821. The cubic root of 1201010155 is about 1062.9566660713.

Adding to 1201010155 its reverse (5510101021), we get a palindrome (6711111176).

The spelling of 1201010155 in words is "one billion, two hundred one million, ten thousand, one hundred fifty-five".