12010021001 has 4 divisors (see below), whose sum is σ = 13101841104. Its totient is φ = 10918200900.

The previous prime is 12010020989. The next prime is 12010021027. The reversal of 12010021001 is 10012001021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12010021001 - 2¹⁸ = 12009758857 is a prime.

It is a super-2 number, since 2×12010021001² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12010021001.

It is not an unprimeable number, because it can be changed into a prime (12010021301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545910035 + ... + 545910056.

It is an arithmetic number, because the mean of its divisors is an integer number (3275460276).

Almost surely, 2^12010021001 is an apocalyptic number.

12010021001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12010021001 is a deficient number, since it is larger than the sum of its proper divisors (1091820103).

12010021001 is a wasteful number, since it uses less digits than its factorization.

12010021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091820102.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 12010021001 its reverse (10012001021), we get a palindrome (22022022022).

The spelling of 12010021001 in words is "twelve billion, ten million, twenty-one thousand, one".