12010101021 has 12 divisors (see below), whose sum is σ = 17357045472. Its totient is φ = 8002523976.

The previous prime is 12010101007. The next prime is 12010101031.

It is a happy number.

12010101021 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12010101021 - 2⁶ = 12010100957 is a prime.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12010100994 and 12010101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12010101031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332721 + ... + 367046.

It is an arithmetic number, because the mean of its divisors is an integer number (1446420456).

Almost surely, 2^12010101021 is an apocalyptic number.

It is an amenable number.

12010101021 is a deficient number, since it is larger than the sum of its proper divisors (5346944451).

12010101021 is a wasteful number, since it uses less digits than its factorization.

12010101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701680 (or 701677 counting only the distinct ones).

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

The spelling of 12010101021 in words is "twelve billion, ten million, one hundred one thousand, twenty-one".