121001102021111 has 4 divisors (see below), whose sum is σ = 130308879099672. Its totient is φ = 111693324942552.

The previous prime is 121001102021087. The next prime is 121001102021143. The reversal of 121001102021111 is 111120201100121.

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 121001102021111 - 2¹⁸ = 121001101758967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001102020111) 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, 4653888539261 + ... + 4653888539286.

It is an arithmetic number, because the mean of its divisors is an integer number (32577219774918).

Almost surely, 2^{121001102021111} is an apocalyptic number.

121001102021111 is a deficient number, since it is larger than the sum of its proper divisors (9307777078561).

121001102021111 is an equidigital number, since it uses as much as digits as its factorization.

121001102021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9307777078560.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121001102021111 its reverse (111120201100121), we get a palindrome (232121303121232).

The spelling of 121001102021111 in words is "one hundred twenty-one trillion, one billion, one hundred two million, twenty-one thousand, one hundred eleven".