20011121201 has 4 divisors (see below), whose sum is σ = 20017450992. Its totient is φ = 20004791412.

The previous prime is 20011121189. The next prime is 20011121203. The reversal of 20011121201 is 10212111002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20011121201 - 2²⁶ = 19944012337 is a prime.

It is a super-2 number, since 2×20011121201² (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 (20011121203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3160151 + ... + 3166476.

It is an arithmetic number, because the mean of its divisors is an integer number (5004362748).

Almost surely, 2^20011121201 is an apocalyptic number.

It is an amenable number.

20011121201 is a deficient number, since it is larger than the sum of its proper divisors (6329791).

20011121201 is an equidigital number, since it uses as much as digits as its factorization.

20011121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6329790.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20011121201 its reverse (10212111002), we get a palindrome (30223232203).

The spelling of 20011121201 in words is "twenty billion, eleven million, one hundred twenty-one thousand, two hundred one".