121101001031 has 2 divisors, whose sum is σ = 121101001032. Its totient is φ = 121101001030.

The previous prime is 121101000983. The next prime is 121101001061. The reversal of 121101001031 is 130100101121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121101001031 is a prime.

It is a super-2 number, since 2×121101001031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121101001061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550500515 + 60550500516.

It is an arithmetic number, because the mean of its divisors is an integer number (60550500516).

Almost surely, 2^121101001031 is an apocalyptic number.

121101001031 is a deficient number, since it is larger than the sum of its proper divisors (1).

121101001031 is an equidigital number, since it uses as much as digits as its factorization.

121101001031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 121101001031 its reverse (130100101121), we get a palindrome (251201102152).

The spelling of 121101001031 in words is "one hundred twenty-one billion, one hundred one million, one thousand, thirty-one".