202111202122 has 4 divisors (see below), whose sum is σ = 303166803186. Its totient is φ = 101055601060.

The previous prime is 202111202101. The next prime is 202111202123. The reversal of 202111202122 is 221202111202.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 159720921801 + 42390280321 = 399651^2 + 205889^2 .

It is a junction number, because it is equal to n+sod(n) for n = 202111202096 and 202111202105.

It is not an unprimeable number, because it can be changed into a prime (202111202123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50527800529 + ... + 50527800532.

Almost surely, 2^202111202122 is an apocalyptic number.

202111202122 is a deficient number, since it is larger than the sum of its proper divisors (101055601064).

202111202122 is a wasteful number, since it uses less digits than its factorization.

202111202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101055601063.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202111202122 its reverse (221202111202), we get a palindrome (423313313324).

The spelling of 202111202122 in words is "two hundred two billion, one hundred eleven million, two hundred two thousand, one hundred twenty-two".