121331013211 has 4 divisors (see below), whose sum is σ = 121369693752. Its totient is φ = 121292332672.

The previous prime is 121331013173. The next prime is 121331013227. The reversal of 121331013211 is 112310133121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112310133121 = 247847 ⋅453143.

It is a cyclic number.

It is not a de Polignac number, because 121331013211 - 2¹⁵ = 121330980443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121331013611) 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, 19335565 + ... + 19341838.

It is an arithmetic number, because the mean of its divisors is an integer number (30342423438).

Almost surely, 2^121331013211 is an apocalyptic number.

121331013211 is a deficient number, since it is larger than the sum of its proper divisors (38680541).

121331013211 is an equidigital number, since it uses as much as digits as its factorization.

121331013211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38680540.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 121331013211 its reverse (112310133121), we get a palindrome (233641146332).

The spelling of 121331013211 in words is "one hundred twenty-one billion, three hundred thirty-one million, thirteen thousand, two hundred eleven".