20202111123131 has 4 divisors (see below), whose sum is σ = 23088126997872. Its totient is φ = 17316095248392.

The previous prime is 20202111123113. The next prime is 20202111123133. The reversal of 20202111123131 is 13132111120202.

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 20202111123131 - 2⁶ = 20202111123067 is a prime.

It is a super-2 number, since 2×20202111123131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20202111123133) 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, 1443007937360 + ... + 1443007937373.

It is an arithmetic number, because the mean of its divisors is an integer number (5772031749468).

Almost surely, 2^{20202111123131} is an apocalyptic number.

20202111123131 is a deficient number, since it is larger than the sum of its proper divisors (2886015874741).

20202111123131 is an equidigital number, since it uses as much as digits as its factorization.

20202111123131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886015874740.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20202111123131 its reverse (13132111120202), we get a palindrome (33334222243333).

The spelling of 20202111123131 in words is "twenty trillion, two hundred two billion, one hundred eleven million, one hundred twenty-three thousand, one hundred thirty-one".