120001211121 has 8 divisors (see below), whose sum is σ = 174547216224. Its totient is φ = 72728006720.

The previous prime is 120001211119. The next prime is 120001211137. The reversal of 120001211121 is 121112100021.

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 120001211121 - 2¹ = 120001211119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120001211097 and 120001211106.

It is not an unprimeable number, because it can be changed into a prime (120001211191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1818200136 + ... + 1818200201.

It is an arithmetic number, because the mean of its divisors is an integer number (21818402028).

Almost surely, 2^120001211121 is an apocalyptic number.

120001211121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120001211121 is a deficient number, since it is larger than the sum of its proper divisors (54546005103).

120001211121 is a wasteful number, since it uses less digits than its factorization.

120001211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3636400351.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 120001211121 its reverse (121112100021), we get a palindrome (241113311142).

Subtracting 120001211121 from its reverse (121112100021), we obtain a square (1110888900 = 33330²).

The spelling of 120001211121 in words is "one hundred twenty billion, one million, two hundred eleven thousand, one hundred twenty-one".