20201012121 has 16 divisors (see below), whose sum is σ = 27240452928. Its totient is φ = 13314840000.

The previous prime is 20201012101. The next prime is 20201012123. The reversal of 20201012121 is 12121010202.

It is not a de Polignac number, because 20201012121 - 2⁷ = 20201011993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20201012097 and 20201012106.

It is not an unprimeable number, because it can be changed into a prime (20201012123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164850 + ... + 259956.

It is an arithmetic number, because the mean of its divisors is an integer number (1702528308).

Almost surely, 2^20201012121 is an apocalyptic number.

It is an amenable number.

20201012121 is a deficient number, since it is larger than the sum of its proper divisors (7039440807).

20201012121 is a wasteful number, since it uses less digits than its factorization.

20201012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95912.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20201012121 its reverse (12121010202), we get a palindrome (32322022323).

The spelling of 20201012121 in words is "twenty billion, two hundred one million, twelve thousand, one hundred twenty-one".