121001431027 has 2 divisors, whose sum is σ = 121001431028. Its totient is φ = 121001431026.

The previous prime is 121001431021. The next prime is 121001431091. The reversal of 121001431027 is 720134100121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121001431027 - 2¹¹ = 121001428979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121001430989 and 121001431007.

It is not a weakly prime, because it can be changed into another prime (121001431021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500715513 + 60500715514.

It is an arithmetic number, because the mean of its divisors is an integer number (60500715514).

Almost surely, 2^121001431027 is an apocalyptic number.

121001431027 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001431027 is an equidigital number, since it uses as much as digits as its factorization.

121001431027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 121001431027 its reverse (720134100121), we get a palindrome (841135531148).

The spelling of 121001431027 in words is "one hundred twenty-one billion, one million, four hundred thirty-one thousand, twenty-seven".