121202121 has 32 divisors (see below), whose sum is σ = 176745600. Its totient is φ = 73612800.

The previous prime is 121202101. The next prime is 121202131.

121202121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 121202121 - 2⁹ = 121201609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121202097 and 121202106.

It is not an unprimeable number, because it can be changed into a prime (121202101) 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, 212725 + ... + 213293.

It is an arithmetic number, because the mean of its divisors is an integer number (5523300).

Almost surely, 2^121202121 is an apocalyptic number.

It is an amenable number.

121202121 is a deficient number, since it is larger than the sum of its proper divisors (55543479).

121202121 is a wasteful number, since it uses less digits than its factorization.

121202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 121202121 is about 11009.1834847095. The cubic root of 121202121 is about 494.8839928129.

It can be divided in two parts, 12120 and 2121, that added together give a palindrome (14241).

The spelling of 121202121 in words is "one hundred twenty-one million, two hundred two thousand, one hundred twenty-one".