100121201211111 has 48 divisors (see below), whose sum is σ = 144461121701760. Its totient is φ = 61653456944640.

The previous prime is 100121201211047. The next prime is 100121201211139. The reversal of 100121201211111 is 111112102121001.

It is not a de Polignac number, because 100121201211111 - 2⁶ = 100121201211047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121201212111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12422256 + ... + 18829626.

It is an arithmetic number, because the mean of its divisors is an integer number (3009606702120).

Almost surely, 2^{100121201211111} is an apocalyptic number.

100121201211111 is a deficient number, since it is larger than the sum of its proper divisors (44339920490649).

100121201211111 is a wasteful number, since it uses less digits than its factorization.

100121201211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6407744 (or 6407727 counting only the distinct ones).

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

Adding to 100121201211111 its reverse (111112102121001), we get a palindrome (211233303332112).

The spelling of 100121201211111 in words is "one hundred trillion, one hundred twenty-one billion, two hundred one million, two hundred eleven thousand, one hundred eleven".