20101321121 has 8 divisors (see below), whose sum is σ = 22974020544. Its totient is φ = 17228892240.

The previous prime is 20101321117. The next prime is 20101321133. The reversal of 20101321121 is 12112310102.

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

It is not a de Polignac number, because 20101321121 - 2² = 20101321117 is a prime.

It is a super-2 number, since 2×20101321121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20101321096 and 20101321105.

It is not an unprimeable number, because it can be changed into a prime (20101321171) 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, 130151 + ... + 239043.

It is an arithmetic number, because the mean of its divisors is an integer number (2871752568).

Almost surely, 2^20101321121 is an apocalyptic number.

It is an amenable number.

20101321121 is a deficient number, since it is larger than the sum of its proper divisors (2872699423).

20101321121 is a wasteful number, since it uses less digits than its factorization.

20101321121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135271.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20101321121 its reverse (12112310102), we get a palindrome (32213631223).

The spelling of 20101321121 in words is "twenty billion, one hundred one million, three hundred twenty-one thousand, one hundred twenty-one".