10120101021 has 24 divisors (see below), whose sum is σ = 14706619200. Its totient is φ = 6705870336.

The previous prime is 10120101011. The next prime is 10120101023. The reversal of 10120101021 is 12010102101.

It is a happy number.

It is not a de Polignac number, because 10120101021 - 2⁶ = 10120100957 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 = 10120100994 and 10120101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120101023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2177326 + ... + 2181968.

It is an arithmetic number, because the mean of its divisors is an integer number (612775800).

Almost surely, 2^10120101021 is an apocalyptic number.

It is an amenable number.

10120101021 is a deficient number, since it is larger than the sum of its proper divisors (4586518179).

10120101021 is a wasteful number, since it uses less digits than its factorization.

10120101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6065 (or 6062 counting only the distinct ones).

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

Adding to 10120101021 its reverse (12010102101), we get a palindrome (22130203122).

The spelling of 10120101021 in words is "ten billion, one hundred twenty million, one hundred one thousand, twenty-one".