121120121 has 16 divisors (see below), whose sum is σ = 133239744. Its totient is φ = 109638144.

The previous prime is 121120099. The next prime is 121120123. The reversal of 121120121 is 121021121.

It is a cyclic number.

It is not a de Polignac number, because 121120121 - 2⁶ = 121120057 is a prime.

It is a super-2 number, since 2×121120121² = 29340167422109282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121120123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47741 + ... + 50213.

It is an arithmetic number, because the mean of its divisors is an integer number (8327484).

Almost surely, 2^121120121 is an apocalyptic number.

It is an amenable number.

121120121 is a deficient number, since it is larger than the sum of its proper divisors (12119623).

121120121 is a wasteful number, since it uses less digits than its factorization.

121120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 121120121 is about 11005.4586910315. The cubic root of 121120121 is about 494.7723620863.

Adding to 121120121 its reverse (121021121), we get a palindrome (242141242).

The spelling of 121120121 in words is "one hundred twenty-one million, one hundred twenty thousand, one hundred twenty-one".