20121120210111 has 8 divisors (see below), whose sum is σ = 26829492245760. Its totient is φ = 13413414157272.

The previous prime is 20121120210101. The next prime is 20121120210119. The reversal of 20121120210111 is 11101202112102.

It is a happy number.

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

It is not a de Polignac number, because 20121120210111 - 2¹⁰ = 20121120209087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121120210119) 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, 166425201 + ... + 166546058.

It is an arithmetic number, because the mean of its divisors is an integer number (3353686530720).

Almost surely, 2^{20121120210111} is an apocalyptic number.

20121120210111 is a deficient number, since it is larger than the sum of its proper divisors (6708372035649).

20121120210111 is a wasteful number, since it uses less digits than its factorization.

20121120210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332991405.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20121120210111 its reverse (11101202112102), we get a palindrome (31222322322213).

The spelling of 20121120210111 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, two hundred ten thousand, one hundred eleven".