20021201135 has 8 divisors (see below), whose sum is σ = 25873552320. Its totient is φ = 14784886944.

The previous prime is 20021201119. The next prime is 20021201159. The reversal of 20021201135 is 53110212002.

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 not a de Polignac number, because 20021201135 - 2⁴ = 20021201119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154009175 + ... + 154009304.

It is an arithmetic number, because the mean of its divisors is an integer number (3234194040).

Almost surely, 2^20021201135 is an apocalyptic number.

20021201135 is a deficient number, since it is larger than the sum of its proper divisors (5852351185).

20021201135 is a wasteful number, since it uses less digits than its factorization.

20021201135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308018497.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 20021201135 its reverse (53110212002), we get a palindrome (73131413137).

The spelling of 20021201135 in words is "twenty billion, twenty-one million, two hundred one thousand, one hundred thirty-five".