10011020121 has 40 divisors (see below), whose sum is σ = 15137448480. Its totient is φ = 6592741632.

The previous prime is 10011020057. The next prime is 10011020147. The reversal of 10011020121 is 12102011001.

It is a happy number.

It is not a de Polignac number, because 10011020121 - 2⁶ = 10011020057 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (10011020161) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6182650 + ... + 6184268.

It is an arithmetic number, because the mean of its divisors is an integer number (378436212).

Almost surely, 2^10011020121 is an apocalyptic number.

It is an amenable number.

10011020121 is a deficient number, since it is larger than the sum of its proper divisors (5126428359).

10011020121 is an equidigital number, since it uses as much as digits as its factorization.

10011020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515 (or 2506 counting only the distinct ones).

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

Adding to 10011020121 its reverse (12102011001), we get a palindrome (22113031122).

The spelling of 10011020121 in words is "ten billion, eleven million, twenty thousand, one hundred twenty-one".