12010002021 has 24 divisors (see below), whose sum is σ = 17461300896. Its totient is φ = 7954346400.

The previous prime is 12010001909. The next prime is 12010002071. The reversal of 12010002021 is 12020001021.

It is not a de Polignac number, because 12010002021 - 2¹³ = 12009993829 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 = 12010001994 and 12010002012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12010002071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3116746 + ... + 3120596.

It is an arithmetic number, because the mean of its divisors is an integer number (727554204).

Almost surely, 2^12010002021 is an apocalyptic number.

It is an amenable number.

12010002021 is a deficient number, since it is larger than the sum of its proper divisors (5451298875).

12010002021 is a wasteful number, since it uses less digits than its factorization.

12010002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6033 (or 6030 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 12010002021 its reverse (12020001021), we get a palindrome (24030003042).

It can be divided in two parts, 1201000 and 2021, that added together give a palindrome (1203021).

The spelling of 12010002021 in words is "twelve billion, ten million, two thousand, twenty-one".