20535334121 has 8 divisors (see below), whose sum is σ = 21618451200. Its totient is φ = 19452448080.

The previous prime is 20535334111. The next prime is 20535334133. The reversal of 20535334121 is 12143353502.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20535334121 is a prime.

It is a super-2 number, since 2×20535334121² (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 (20535334111) 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, 142535 + ... + 247763.

It is an arithmetic number, because the mean of its divisors is an integer number (2702306400).

Almost surely, 2^20535334121 is an apocalyptic number.

It is an amenable number.

20535334121 is a deficient number, since it is larger than the sum of its proper divisors (1083117079).

20535334121 is a wasteful number, since it uses less digits than its factorization.

20535334121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115519.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 20535334121 its reverse (12143353502), we get a palindrome (32678687623).

The spelling of 20535334121 in words is "twenty billion, five hundred thirty-five million, three hundred thirty-four thousand, one hundred twenty-one".