1201213131 has 8 divisors (see below), whose sum is σ = 1611208704. Its totient is φ = 796013160.

The previous prime is 1201213129. The next prime is 1201213187. The reversal of 1201213131 is 1313121021.

It is a happy number.

1201213131 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1201213131 - 2¹ = 1201213129 is a prime.

It is a super-3 number, since 3×1201213131³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1201213131.

It is not an unprimeable number, because it can be changed into a prime (1201217131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1198315 + ... + 1199316.

It is an arithmetic number, because the mean of its divisors is an integer number (201401088).

Almost surely, 2^1201213131 is an apocalyptic number.

1201213131 is a deficient number, since it is larger than the sum of its proper divisors (409995573).

1201213131 is a wasteful number, since it uses less digits than its factorization.

1201213131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397801.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1201213131 is about 34658.5217659380. The cubic root of 1201213131 is about 1063.0165441492.

Adding to 1201213131 its reverse (1313121021), we get a palindrome (2514334152).

The spelling of 1201213131 in words is "one billion, two hundred one million, two hundred thirteen thousand, one hundred thirty-one".