1020221102121 has 16 divisors (see below), whose sum is σ = 1492573110336. Its totient is φ = 615982550976.

The previous prime is 1020221102071. The next prime is 1020221102189. The reversal of 1020221102121 is 1212011220201.

1020221102121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1020221102121 - 2⁶ = 1020221102057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020221102121.

It is not an unprimeable number, because it can be changed into a prime (1020221102821) 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, 246785815 + ... + 246789948.

It is an arithmetic number, because the mean of its divisors is an integer number (93285819396).

Almost surely, 2^{1020221102121} is an apocalyptic number.

It is an amenable number.

1020221102121 is a deficient number, since it is larger than the sum of its proper divisors (472352008215).

1020221102121 is a wasteful number, since it uses less digits than its factorization.

1020221102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493575832.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1020221102121 its reverse (1212011220201), we get a palindrome (2232232322322).

The spelling of 1020221102121 in words is "one trillion, twenty billion, two hundred twenty-one million, one hundred two thousand, one hundred twenty-one".