1020201122121 has 48 divisors (see below), whose sum is σ = 1512300626304. Its totient is φ = 610473701376.

The previous prime is 1020201122093. The next prime is 1020201122123. The reversal of 1020201122121 is 1212211020201.

It is not a de Polignac number, because 1020201122121 - 2¹⁰ = 1020201121097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020201122121.

It is not an unprimeable number, because it can be changed into a prime (1020201122123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6644211 + ... + 6796023.

It is an arithmetic number, because the mean of its divisors is an integer number (31506263048).

Almost surely, 2^{1020201122121} is an apocalyptic number.

It is an amenable number.

1020201122121 is a deficient number, since it is larger than the sum of its proper divisors (492099504183).

1020201122121 is a wasteful number, since it uses less digits than its factorization.

1020201122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152210 (or 152193 counting only the distinct ones).

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

Adding to 1020201122121 its reverse (1212211020201), we get a palindrome (2232412142322).

The spelling of 1020201122121 in words is "one trillion, twenty billion, two hundred one million, one hundred twenty-two thousand, one hundred twenty-one".