201121020106 has 8 divisors (see below), whose sum is σ = 301686365664. Its totient is φ = 100558898220.

The previous prime is 201121020103. The next prime is 201121020109. The reversal of 201121020106 is 601020121102.

It is an interprime number because it is at equal distance from previous prime (201121020103) and next prime (201121020109).

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

It is a self number, because there is not a number n which added to its sum of digits gives 201121020106.

It is not an unprimeable number, because it can be changed into a prime (201121020101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643390 + ... + 903433.

It is an arithmetic number, because the mean of its divisors is an integer number (37710795708).

Almost surely, 2^201121020106 is an apocalyptic number.

201121020106 is a deficient number, since it is larger than the sum of its proper divisors (100565345558).

201121020106 is a wasteful number, since it uses less digits than its factorization.

201121020106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611836.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 201121020106 its reverse (601020121102), we get a palindrome (802141141208).

The spelling of 201121020106 in words is "two hundred one billion, one hundred twenty-one million, twenty thousand, one hundred six".