20010112121 has 8 divisors (see below), whose sum is σ = 20050800264. Its totient is φ = 19969456000.

The previous prime is 20010112103. The next prime is 20010112127. The reversal of 20010112121 is 12121101002.

It can be written as a sum of positive squares in 4 ways, for example, as 1298881600 + 18711230521 = 36040^2 + 136789^2 .

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 20010112121 - 2²⁶ = 19943003257 is a prime.

It is a super-2 number, since 2×20010112121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010112127) 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, 1532621 + ... + 1545621.

It is an arithmetic number, because the mean of its divisors is an integer number (2506350033).

Almost surely, 2^20010112121 is an apocalyptic number.

It is an amenable number.

20010112121 is a deficient number, since it is larger than the sum of its proper divisors (40688143).

20010112121 is a wasteful number, since it uses less digits than its factorization.

20010112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16011.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20010112121 its reverse (12121101002), we get a palindrome (32131213123).

The spelling of 20010112121 in words is "twenty billion, ten million, one hundred twelve thousand, one hundred twenty-one".