20012033121 has 8 divisors (see below), whose sum is σ = 26724999744. Its totient is φ = 13320210960.

The previous prime is 20012033101. The next prime is 20012033147. The reversal of 20012033121 is 12133021002.

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

It is not a de Polignac number, because 20012033121 - 2⁶ = 20012033057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20012033121.

It is not an unprimeable number, because it can be changed into a prime (20012033101) 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, 5283906 + ... + 5287691.

It is an arithmetic number, because the mean of its divisors is an integer number (3340624968).

Almost surely, 2^20012033121 is an apocalyptic number.

It is an amenable number.

20012033121 is a deficient number, since it is larger than the sum of its proper divisors (6712966623).

20012033121 is a wasteful number, since it uses less digits than its factorization.

20012033121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10572231.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20012033121 its reverse (12133021002), we get a palindrome (32145054123).

The spelling of 20012033121 in words is "twenty billion, twelve million, thirty-three thousand, one hundred twenty-one".