20110210202121 has 32 divisors (see below), whose sum is σ = 28994291609472. Its totient is φ = 12324913344000.

The previous prime is 20110210202113. The next prime is 20110210202141. The reversal of 20110210202121 is 12120201201102.

It is not a de Polignac number, because 20110210202121 - 2³ = 20110210202113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20110210202121.

It is not an unprimeable number, because it can be changed into a prime (20110210202101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97522701 + ... + 97728693.

It is an arithmetic number, because the mean of its divisors is an integer number (906071612796).

Almost surely, 2^{20110210202121} is an apocalyptic number.

It is an amenable number.

20110210202121 is a deficient number, since it is larger than the sum of its proper divisors (8884081407351).

20110210202121 is a wasteful number, since it uses less digits than its factorization.

20110210202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216233.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20110210202121 its reverse (12120201201102), we get a palindrome (32230411403223).

The spelling of 20110210202121 in words is "twenty trillion, one hundred ten billion, two hundred ten million, two hundred two thousand, one hundred twenty-one".