121131032213 has 4 divisors (see below), whose sum is σ = 121134533100. Its totient is φ = 121127531328.

The previous prime is 121131032173. The next prime is 121131032233. The reversal of 121131032213 is 312230131121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312230131121 = 1931 ⋅161693491.

It can be written as a sum of positive squares in 2 ways, for example, as 33882869329 + 87248162884 = 184073^2 + 295378^2 .

It is a cyclic number.

It is not a de Polignac number, because 121131032213 - 2²⁶ = 121063923349 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 (121131032233) 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, 1698020 + ... + 1767917.

It is an arithmetic number, because the mean of its divisors is an integer number (30283633275).

Almost surely, 2^121131032213 is an apocalyptic number.

It is an amenable number.

121131032213 is a deficient number, since it is larger than the sum of its proper divisors (3500887).

121131032213 is an equidigital number, since it uses as much as digits as its factorization.

121131032213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500886.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121131032213 its reverse (312230131121), we get a palindrome (433361163334).

The spelling of 121131032213 in words is "one hundred twenty-one billion, one hundred thirty-one million, thirty-two thousand, two hundred thirteen".