20112121211 has 8 divisors (see below), whose sum is σ = 24753380064. Its totient is φ = 15912887040.

The previous prime is 20112121189. The next prime is 20112121229. The reversal of 20112121211 is 11212121102.

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 20112121211 - 2⁶ = 20112121147 is a prime.

It is a super-2 number, since 2×20112121211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20112121241) 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, 110506070 + ... + 110506251.

It is an arithmetic number, because the mean of its divisors is an integer number (3094172508).

Almost surely, 2^20112121211 is an apocalyptic number.

20112121211 is a deficient number, since it is larger than the sum of its proper divisors (4641258853).

20112121211 is a wasteful number, since it uses less digits than its factorization.

20112121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221012341.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20112121211 its reverse (11212121102), we get a palindrome (31324242313).

The spelling of 20112121211 in words is "twenty billion, one hundred twelve million, one hundred twenty-one thousand, two hundred eleven".