20202123101111 has 8 divisors (see below), whose sum is σ = 23098924515744. Its totient is φ = 17308017643680.

The previous prime is 20202123101071. The next prime is 20202123101141. The reversal of 20202123101111 is 11110132120202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20202123101111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20202123101111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202123101141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673973240 + ... + 674003213.

It is an arithmetic number, because the mean of its divisors is an integer number (2887365564468).

Almost surely, 2^{20202123101111} is an apocalyptic number.

20202123101111 is a deficient number, since it is larger than the sum of its proper divisors (2896801414633).

20202123101111 is a wasteful number, since it uses less digits than its factorization.

20202123101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347978601.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20202123101111 its reverse (11110132120202), we get a palindrome (31312255221313).

The spelling of 20202123101111 in words is "twenty trillion, two hundred two billion, one hundred twenty-three million, one hundred one thousand, one hundred eleven".