121100212011111 has 32 divisors (see below), whose sum is σ = 169134539954688. Its totient is φ = 76989682224000.

The previous prime is 121100212011109. The next prime is 121100212011131. The reversal of 121100212011111 is 111110212001121.

121100212011111 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 121100212011111 - 2¹ = 121100212011109 is a prime.

It is a super-2 number, since 2×121100212011111² (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 (121100212011131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4954765 + ... + 16332486.

It is an arithmetic number, because the mean of its divisors is an integer number (5285454373584).

Almost surely, 2^{121100212011111} is an apocalyptic number.

121100212011111 is a deficient number, since it is larger than the sum of its proper divisors (48034327943577).

121100212011111 is a wasteful number, since it uses less digits than its factorization.

121100212011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21288311.

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

Adding to 121100212011111 its reverse (111110212001121), we get a palindrome (232210424012232).

The spelling of 121100212011111 in words is "one hundred twenty-one trillion, one hundred billion, two hundred twelve million, eleven thousand, one hundred eleven".