121031220121 has 16 divisors (see below), whose sum is σ = 146135600640. Its totient is φ = 98032616640.

The previous prime is 121031220097. The next prime is 121031220173. The reversal of 121031220121 is 121022130121.

It is not a de Polignac number, because 121031220121 - 2⁹ = 121031219609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121031220095 and 121031220104.

It is not an unprimeable number, because it can be changed into a prime (121031224121) 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 15 ways as a sum of consecutive naturals, for example, 6333150 + ... + 6352231.

It is an arithmetic number, because the mean of its divisors is an integer number (9133475040).

Almost surely, 2^121031220121 is an apocalyptic number.

It is an amenable number.

121031220121 is a deficient number, since it is larger than the sum of its proper divisors (25104380519).

121031220121 is a wasteful number, since it uses less digits than its factorization.

121031220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12685464.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121031220121 its reverse (121022130121), we get a palindrome (242053350242).

The spelling of 121031220121 in words is "one hundred twenty-one billion, thirty-one million, two hundred twenty thousand, one hundred twenty-one".