20211120442131 has 4 divisors (see below), whose sum is σ = 26948160589512. Its totient is φ = 13474080294752.

The previous prime is 20211120442091. The next prime is 20211120442153. The reversal of 20211120442131 is 13124402111202.

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

It is a cyclic number.

It is not a de Polignac number, because 20211120442131 - 2²² = 20211116247827 is a prime.

It is a super-2 number, since 2×20211120442131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20211120442231) 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, 3368520073686 + ... + 3368520073691.

It is an arithmetic number, because the mean of its divisors is an integer number (6737040147378).

Almost surely, 2^{20211120442131} is an apocalyptic number.

20211120442131 is a deficient number, since it is larger than the sum of its proper divisors (6737040147381).

20211120442131 is an equidigital number, since it uses as much as digits as its factorization.

20211120442131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6737040147380.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 20211120442131 its reverse (13124402111202), we get a palindrome (33335522553333).

The spelling of 20211120442131 in words is "twenty trillion, two hundred eleven billion, one hundred twenty million, four hundred forty-two thousand, one hundred thirty-one".