100121210121111 has 4 divisors (see below), whose sum is σ = 133494946828152. Its totient is φ = 66747473414072.

The previous prime is 100121210121007. The next prime is 100121210121167. The reversal of 100121210121111 is 111121012121001.

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 100121210121111 - 2⁷ = 100121210120983 is a prime.

It is a super-2 number, since 2×100121210121111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121210021111) 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, 16686868353516 + ... + 16686868353521.

It is an arithmetic number, because the mean of its divisors is an integer number (33373736707038).

Almost surely, 2^{100121210121111} is an apocalyptic number.

100121210121111 is a deficient number, since it is larger than the sum of its proper divisors (33373736707041).

100121210121111 is an equidigital number, since it uses as much as digits as its factorization.

100121210121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33373736707040.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 100121210121111 its reverse (111121012121001), we get a palindrome (211242222242112).

The spelling of 100121210121111 in words is "one hundred trillion, one hundred twenty-one billion, two hundred ten million, one hundred twenty-one thousand, one hundred eleven".