12101423021 has 16 divisors (see below), whose sum is σ = 13831430400. Its totient is φ = 10518697728.

The previous prime is 12101423003. The next prime is 12101423023. The reversal of 12101423021 is 12032410121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12101423021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101423023) 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, 522281 + ... + 544958.

It is an arithmetic number, because the mean of its divisors is an integer number (864464400).

Almost surely, 2^12101423021 is an apocalyptic number.

It is an amenable number.

12101423021 is a deficient number, since it is larger than the sum of its proper divisors (1730007379).

12101423021 is a wasteful number, since it uses less digits than its factorization.

12101423021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067308.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12101423021 its reverse (12032410121), we get a palindrome (24133833142).

The spelling of 12101423021 in words is "twelve billion, one hundred one million, four hundred twenty-three thousand, twenty-one".