20202120202123 has 4 divisors (see below), whose sum is σ = 20398257291568. Its totient is φ = 20005983112680.

The previous prime is 20202120202111. The next prime is 20202120202139. The reversal of 20202120202123 is 32120202120202.

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 20202120202123 - 2⁵ = 20202120202091 is a prime.

It is a super-2 number, since 2×20202120202123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20202120202123.

It is not an unprimeable number, because it can be changed into a prime (20202120202183) 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, 98068544568 + ... + 98068544773.

It is an arithmetic number, because the mean of its divisors is an integer number (5099564322892).

Almost surely, 2^{20202120202123} is an apocalyptic number.

20202120202123 is a deficient number, since it is larger than the sum of its proper divisors (196137089445).

20202120202123 is a wasteful number, since it uses less digits than its factorization.

20202120202123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196137089444.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20202120202123 its reverse (32120202120202), we get a palindrome (52322322322325).

The spelling of 20202120202123 in words is "twenty trillion, two hundred two billion, one hundred twenty million, two hundred two thousand, one hundred twenty-three".