20202123211 has 8 divisors (see below), whose sum is σ = 20360024784. Its totient is φ = 20044277760.

The previous prime is 20202123199. The next prime is 20202123251. The reversal of 20202123211 is 11232120202.

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 not a de Polignac number, because 20202123211 - 2³¹ = 18054639563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20202123251) 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, 982411 + ... + 1002763.

It is an arithmetic number, because the mean of its divisors is an integer number (2545003098).

Almost surely, 2^20202123211 is an apocalyptic number.

20202123211 is a deficient number, since it is larger than the sum of its proper divisors (157901573).

20202123211 is a wasteful number, since it uses less digits than its factorization.

20202123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28061.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20202123211 its reverse (11232120202), we get a palindrome (31434243413).

The spelling of 20202123211 in words is "twenty billion, two hundred two million, one hundred twenty-three thousand, two hundred eleven".