121331611201 has 2 divisors, whose sum is σ = 121331611202. Its totient is φ = 121331611200.

The previous prime is 121331611139. The next prime is 121331611213. The reversal of 121331611201 is 102116133121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121329608976 + 2002225 = 348324^2 + 1415^2 .

It is an emirp because it is prime and its reverse (102116133121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121331611201 - 2³⁵ = 86971872833 is a prime.

It is not a weakly prime, because it can be changed into another prime (121331611001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60665805600 + 60665805601.

It is an arithmetic number, because the mean of its divisors is an integer number (60665805601).

Almost surely, 2^121331611201 is an apocalyptic number.

It is an amenable number.

121331611201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121331611201 is an equidigital number, since it uses as much as digits as its factorization.

121331611201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 121331611201 its reverse (102116133121), we get a palindrome (223447744322).

The spelling of 121331611201 in words is "one hundred twenty-one billion, three hundred thirty-one million, six hundred eleven thousand, two hundred one".