10020121011 has 48 divisors (see below), whose sum is σ = 16067397600. Its totient is φ = 6168254976.

The previous prime is 10020120973. The next prime is 10020121021. The reversal of 10020121011 is 11012102001.

It is a happy number.

It is not a de Polignac number, because 10020121011 - 2⁷ = 10020120883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10020120984 and 10020121002.

It is not an unprimeable number, because it can be changed into a prime (10020121021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 401445 + ... + 425673.

It is an arithmetic number, because the mean of its divisors is an integer number (334737450).

Almost surely, 2^10020121011 is an apocalyptic number.

10020121011 is a deficient number, since it is larger than the sum of its proper divisors (6047276589).

10020121011 is a wasteful number, since it uses less digits than its factorization.

10020121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24325 (or 24302 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10020121011 its reverse (11012102001), we get a palindrome (21032223012).

The spelling of 10020121011 in words is "ten billion, twenty million, one hundred twenty-one thousand, eleven".