201121212110 has 32 divisors (see below), whose sum is σ = 445560841152. Its totient is φ = 63651548160.

The previous prime is 201121212073. The next prime is 201121212133. The reversal of 201121212110 is 11212121102.

It is a super-2 number, since 2×201121212110² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110505251 + ... + 110507070.

It is an arithmetic number, because the mean of its divisors is an integer number (13923776286).

Almost surely, 2^201121212110 is an apocalyptic number.

201121212110 is an abundant number, since it is smaller than the sum of its proper divisors (244439629042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201121212110 is a wasteful number, since it uses less digits than its factorization.

201121212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221012348.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201121212110 its reverse (11212121102), we get a palindrome (212333333212).

The spelling of 201121212110 in words is "two hundred one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred ten".