12010001421 has 16 divisors (see below), whose sum is σ = 17941232448. Its totient is φ = 7082064000.

The previous prime is 12010001413. The next prime is 12010001429. The reversal of 12010001421 is 12410001021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12010001413) and next prime (12010001429).

It is not a de Polignac number, because 12010001421 - 2³ = 12010001413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12010001397 and 12010001406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12010001429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4916880 + ... + 4919321.

It is an arithmetic number, because the mean of its divisors is an integer number (1121327028).

Almost surely, 2^12010001421 is an apocalyptic number.

12010001421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12010001421 is a deficient number, since it is larger than the sum of its proper divisors (5931231027).

12010001421 is a wasteful number, since it uses less digits than its factorization.

12010001421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9836252.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12010001421 its reverse (12410001021), we get a palindrome (24420002442).

The spelling of 12010001421 in words is "twelve billion, ten million, one thousand, four hundred twenty-one".