10121200012111 has 4 divisors (see below), whose sum is σ = 10128636604224. Its totient is φ = 10113763420000.

The previous prime is 10121200012109. The next prime is 10121200012129. The reversal of 10121200012111 is 11121000212101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10121200012111 - 2¹ = 10121200012109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121200012091 and 10121200012100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121200012171) 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, 3718294015 + ... + 3718296736.

It is an arithmetic number, because the mean of its divisors is an integer number (2532159151056).

Almost surely, 2^{10121200012111} is an apocalyptic number.

10121200012111 is a deficient number, since it is larger than the sum of its proper divisors (7436592113).

10121200012111 is an equidigital number, since it uses as much as digits as its factorization.

10121200012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7436592112.

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

Adding to 10121200012111 its reverse (11121000212101), we get a palindrome (21242200224212).

The spelling of 10121200012111 in words is "ten trillion, one hundred twenty-one billion, two hundred million, twelve thousand, one hundred eleven".