121012022121221 has 16 divisors (see below), whose sum is σ = 150872665817088. Its totient is φ = 94294748209200.

The previous prime is 121012022121163. The next prime is 121012022121247. The reversal of 121012022121221 is 122121220210121.

It is not a de Polignac number, because 121012022121221 - 2²⁶ = 121011955012357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121012022121193 and 121012022121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012022121421) 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, 20338556 + ... + 25606266.

It is an arithmetic number, because the mean of its divisors is an integer number (9429541613568).

Almost surely, 2^{121012022121221} is an apocalyptic number.

121012022121221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121012022121221 is a deficient number, since it is larger than the sum of its proper divisors (29860643695867).

121012022121221 is a wasteful number, since it uses less digits than its factorization.

121012022121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5566072.

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

Adding to 121012022121221 its reverse (122121220210121), we get a palindrome (243133242331342).

The spelling of 121012022121221 in words is "one hundred twenty-one trillion, twelve billion, twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".