20100100121111 has 8 divisors (see below), whose sum is σ = 20429849989248. Its totient is φ = 19770357996000.

The previous prime is 20100100121099. The next prime is 20100100121119. The reversal of 20100100121111 is 11112100100102.

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 20100100121111 - 2⁶ = 20100100121047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100100121092 and 20100100121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100100121119) 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, 3419141 + ... + 7203521.

It is an arithmetic number, because the mean of its divisors is an integer number (2553731248656).

Almost surely, 2^{20100100121111} is an apocalyptic number.

20100100121111 is a deficient number, since it is larger than the sum of its proper divisors (329749868137).

20100100121111 is an equidigital number, since it uses as much as digits as its factorization.

20100100121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3871513.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20100100121111 its reverse (11112100100102), we get a palindrome (31212200221213).

The spelling of 20100100121111 in words is "twenty trillion, one hundred billion, one hundred million, one hundred twenty-one thousand, one hundred eleven".