121001012111 has 8 divisors (see below), whose sum is σ = 138301756320. Its totient is φ = 103703989248.

The previous prime is 121001012101. The next prime is 121001012117. The reversal of 121001012111 is 111210100121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121001012111 - 2¹⁸ = 121000749967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121001012092 and 121001012101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001012117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860306 + ... + 991023.

It is an arithmetic number, because the mean of its divisors is an integer number (17287719540).

Almost surely, 2^121001012111 is an apocalyptic number.

121001012111 is a deficient number, since it is larger than the sum of its proper divisors (17300744209).

121001012111 is an equidigital number, since it uses as much as digits as its factorization.

121001012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860673.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121001012111 its reverse (111210100121), we get a palindrome (232211112232).

The spelling of 121001012111 in words is "one hundred twenty-one billion, one million, twelve thousand, one hundred eleven".