10103121011 has 4 divisors (see below), whose sum is σ = 10103386800. Its totient is φ = 10102855224.

The previous prime is 10103120917. The next prime is 10103121031. The reversal of 10103121011 is 11012130101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10103121011 - 2¹⁰ = 10103119987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10103120983 and 10103121001.

It is not an unprimeable number, because it can be changed into a prime (10103121031) 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, 63956 + ... + 155873.

It is an arithmetic number, because the mean of its divisors is an integer number (2525846700).

Almost surely, 2^10103121011 is an apocalyptic number.

10103121011 is a deficient number, since it is larger than the sum of its proper divisors (265789).

10103121011 is an equidigital number, since it uses as much as digits as its factorization.

10103121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265788.

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

Adding to 10103121011 its reverse (11012130101), we get a palindrome (21115251112).

The spelling of 10103121011 in words is "ten billion, one hundred three million, one hundred twenty-one thousand, eleven".