121131004213 has 8 divisors (see below), whose sum is σ = 128345885208. Its totient is φ = 113926070784.

The previous prime is 121131004193. The next prime is 121131004243. The reversal of 121131004213 is 312400131121.

It can be written as a sum of positive squares in 4 ways, for example, as 70448838084 + 50682166129 = 265422^2 + 225127^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121131004213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121131004243) 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, 2461806 + ... + 2510527.

It is an arithmetic number, because the mean of its divisors is an integer number (16043235651).

Almost surely, 2^121131004213 is an apocalyptic number.

It is an amenable number.

121131004213 is a deficient number, since it is larger than the sum of its proper divisors (7214880995).

121131004213 is a wasteful number, since it uses less digits than its factorization.

121131004213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4973783.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121131004213 its reverse (312400131121), we get a palindrome (433531135334).

The spelling of 121131004213 in words is "one hundred twenty-one billion, one hundred thirty-one million, four thousand, two hundred thirteen".