11100121031 has 2 divisors, whose sum is σ = 11100121032. Its totient is φ = 11100121030.

The previous prime is 11100121009. The next prime is 11100121033. The reversal of 11100121031 is 13012100111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11100121031 - 2¹⁰ = 11100120007 is a prime.

It is a super-2 number, since 2×11100121031² (a number of 21 digits) contains 22 as substring.

Together with 11100121033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11100121033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550060515 + 5550060516.

It is an arithmetic number, because the mean of its divisors is an integer number (5550060516).

Almost surely, 2^11100121031 is an apocalyptic number.

11100121031 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100121031 is an equidigital number, since it uses as much as digits as its factorization.

11100121031 is an evil number, because the sum of its binary digits is even.

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

Adding to 11100121031 its reverse (13012100111), we get a palindrome (24112221142).

The spelling of 11100121031 in words is "eleven billion, one hundred million, one hundred twenty-one thousand, thirty-one".