20211103213442 has 4 divisors (see below), whose sum is σ = 30316654820166. Its totient is φ = 10105551606720.

The previous prime is 20211103213421. The next prime is 20211103213463. The reversal of 20211103213442 is 24431230111202.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (20211103213421) and next prime (20211103213463).

It can be written as a sum of positive squares in only one way, i.e., 15029648022481 + 5181455190961 = 3876809^2 + 2276281^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5052775803359 + ... + 5052775803362.

Almost surely, 2^{20211103213442} is an apocalyptic number.

20211103213442 is a deficient number, since it is larger than the sum of its proper divisors (10105551606724).

20211103213442 is a wasteful number, since it uses less digits than its factorization.

20211103213442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105551606723.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 20211103213442 its reverse (24431230111202), we get a palindrome (44642333324644).

The spelling of 20211103213442 in words is "twenty trillion, two hundred eleven billion, one hundred three million, two hundred thirteen thousand, four hundred forty-two".