20121135201 has 24 divisors (see below), whose sum is σ = 29350429056. Its totient is φ = 13282401600.

The previous prime is 20121135143. The next prime is 20121135253. The reversal of 20121135201 is 10253112102.

20121135201 is a `hidden beast` number, since 20 + 12 + 113 + 520 + 1 = 666.

It is not a de Polignac number, because 20121135201 - 2¹⁵ = 20121102433 is a prime.

It is a super-3 number, since 3×20121135201³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121135901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 401716 + ... + 449018.

It is an arithmetic number, because the mean of its divisors is an integer number (1222934544).

Almost surely, 2^20121135201 is an apocalyptic number.

It is an amenable number.

20121135201 is a deficient number, since it is larger than the sum of its proper divisors (9229293855).

20121135201 is a wasteful number, since it uses less digits than its factorization.

20121135201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47773 (or 47770 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 20121135201 its reverse (10253112102), we get a palindrome (30374247303).

The spelling of 20121135201 in words is "twenty billion, one hundred twenty-one million, one hundred thirty-five thousand, two hundred one".