12102020023442 has 4 divisors (see below), whose sum is σ = 18153030035166. Its totient is φ = 6051010011720.

The previous prime is 12102020023417. The next prime is 12102020023487. The reversal of 12102020023442 is 24432002020121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11469404995801 + 632615027641 = 3386651^2 + 795371^2 .

It is a super-2 number, since 2×12102020023442² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3025505005859 + ... + 3025505005862.

Almost surely, 2^{12102020023442} is an apocalyptic number.

12102020023442 is a deficient number, since it is larger than the sum of its proper divisors (6051010011724).

12102020023442 is an equidigital number, since it uses as much as digits as its factorization.

12102020023442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6051010011723.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12102020023442 its reverse (24432002020121), we get a palindrome (36534022043563).

The spelling of 12102020023442 in words is "twelve trillion, one hundred two billion, twenty million, twenty-three thousand, four hundred forty-two".