202101122 has 4 divisors (see below), whose sum is σ = 303151686. Its totient is φ = 101050560.

The previous prime is 202101091. The next prime is 202101127. The reversal of 202101122 is 221101202.

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., 156525121 + 45576001 = 12511^2 + 6751^2 .

It is not an unprimeable number, because it can be changed into a prime (202101127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50525279 + ... + 50525282.

Almost surely, 2^202101122 is an apocalyptic number.

202101122 is a deficient number, since it is larger than the sum of its proper divisors (101050564).

202101122 is a wasteful number, since it uses less digits than its factorization.

202101122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101050563.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 202101122 is about 14216.2274179896. The cubic root of 202101122 is about 586.8443237066.

Adding to 202101122 its reverse (221101202), we get a palindrome (423202324).

The spelling of 202101122 in words is "two hundred two million, one hundred one thousand, one hundred twenty-two".