1131420201 has 4 divisors (see below), whose sum is σ = 1508560272. Its totient is φ = 754280132.

The previous prime is 1131420197. The next prime is 1131420293. The reversal of 1131420201 is 1020241311.

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: 1020241311 = 3 ⋅340080437.

It is a cyclic number.

It is not a de Polignac number, because 1131420201 - 2² = 1131420197 is a prime.

It is a super-2 number, since 2×1131420201² = 2560223342461760802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1131424201) 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, 188570031 + ... + 188570036.

It is an arithmetic number, because the mean of its divisors is an integer number (377140068).

Almost surely, 2^1131420201 is an apocalyptic number.

It is an amenable number.

1131420201 is a deficient number, since it is larger than the sum of its proper divisors (377140071).

1131420201 is an equidigital number, since it uses as much as digits as its factorization.

1131420201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377140070.

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

The square root of 1131420201 is about 33636.5902106620. The cubic root of 1131420201 is about 1042.0166126148.

Adding to 1131420201 its reverse (1020241311), we get a palindrome (2151661512).

The spelling of 1131420201 in words is "one billion, one hundred thirty-one million, four hundred twenty thousand, two hundred one".