20110221121 has 8 divisors (see below), whose sum is σ = 20399840064. Its totient is φ = 19820779440.

The previous prime is 20110221083. The next prime is 20110221127. The reversal of 20110221121 is 12112201102.

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

It is a cyclic number.

It is not a de Polignac number, because 20110221121 - 2⁷ = 20110220993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20110221127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193315 + ... + 278551.

It is an arithmetic number, because the mean of its divisors is an integer number (2549980008).

Almost surely, 2^20110221121 is an apocalyptic number.

It is an amenable number.

20110221121 is a deficient number, since it is larger than the sum of its proper divisors (289618943).

20110221121 is an equidigital number, since it uses as much as digits as its factorization.

20110221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88631.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20110221121 its reverse (12112201102), we get a palindrome (32222422223).

The spelling of 20110221121 in words is "twenty billion, one hundred ten million, two hundred twenty-one thousand, one hundred twenty-one".