121012221022121 has 16 divisors (see below), whose sum is σ = 142168856780160. Its totient is φ = 101548250469120.

The previous prime is 121012221022037. The next prime is 121012221022193. The reversal of 121012221022121 is 121220122210121.

It is a de Polignac number, because none of the positive numbers 2^k-121012221022121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121012221022093 and 121012221022102.

It is not an unprimeable number, because it can be changed into a prime (121012221922121) 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, 31273601 + ... + 34929393.

It is an arithmetic number, because the mean of its divisors is an integer number (8885553548760).

Almost surely, 2^{121012221022121} is an apocalyptic number.

121012221022121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121012221022121 is a deficient number, since it is larger than the sum of its proper divisors (21156635758039).

121012221022121 is a wasteful number, since it uses less digits than its factorization.

121012221022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3887296.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121012221022121 its reverse (121220122210121), we get a palindrome (242232343232242).

The spelling of 121012221022121 in words is "one hundred twenty-one trillion, twelve billion, two hundred twenty-one million, twenty-two thousand, one hundred twenty-one".