20121001120111 has 8 divisors (see below), whose sum is σ = 22230875918304. Its totient is φ = 18114047043840.

The previous prime is 20121001120079. The next prime is 20121001120123. The reversal of 20121001120111 is 11102110012102.

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 20121001120111 - 2⁵ = 20121001120079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20121001120091 and 20121001120100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121001120151) 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, 25730180070 + ... + 25730180851.

It is an arithmetic number, because the mean of its divisors is an integer number (2778859489788).

Almost surely, 2^{20121001120111} is an apocalyptic number.

20121001120111 is a deficient number, since it is larger than the sum of its proper divisors (2109874798193).

20121001120111 is a wasteful number, since it uses less digits than its factorization.

20121001120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51460360961.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20121001120111 its reverse (11102110012102), we get a palindrome (31223111132213).

The spelling of 20121001120111 in words is "twenty trillion, one hundred twenty-one billion, one million, one hundred twenty thousand, one hundred eleven".