1201130421 has 4 divisors (see below), whose sum is σ = 1601507232. Its totient is φ = 800753612.

The previous prime is 1201130417. The next prime is 1201130423. The reversal of 1201130421 is 1240311021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1240311021 = 3 ⋅413437007.

It is a cyclic number.

It is not a de Polignac number, because 1201130421 - 2² = 1201130417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201130421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201130423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200188401 + ... + 200188406.

It is an arithmetic number, because the mean of its divisors is an integer number (400376808).

Almost surely, 2^1201130421 is an apocalyptic number.

It is an amenable number.

1201130421 is a deficient number, since it is larger than the sum of its proper divisors (400376811).

1201130421 is an equidigital number, since it uses as much as digits as its factorization.

1201130421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400376810.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1201130421 is about 34657.3285323609. The cubic root of 1201130421 is about 1062.9921454492.

Adding to 1201130421 its reverse (1240311021), we get a palindrome (2441441442).

The spelling of 1201130421 in words is "one billion, two hundred one million, one hundred thirty thousand, four hundred twenty-one".