121020120221 has 32 divisors (see below), whose sum is σ = 162647240448. Its totient is φ = 86962429440.

The previous prime is 121020120163. The next prime is 121020120259. The reversal of 121020120221 is 122021020121.

It is a cyclic number.

It is not a de Polignac number, because 121020120221 - 2³⁰ = 119946378397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121020120196 and 121020120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020120721) 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, 975515 + ... + 1092551.

It is an arithmetic number, because the mean of its divisors is an integer number (5082726264).

Almost surely, 2^121020120221 is an apocalyptic number.

121020120221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121020120221 is a deficient number, since it is larger than the sum of its proper divisors (41627120227).

121020120221 is a wasteful number, since it uses less digits than its factorization.

121020120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118101.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121020120221 its reverse (122021020121), we get a palindrome (243041140342).

The spelling of 121020120221 in words is "one hundred twenty-one billion, twenty million, one hundred twenty thousand, two hundred twenty-one".