1020122222121 has 64 divisors (see below), whose sum is σ = 1593383616000. Its totient is φ = 644159174400.

The previous prime is 1020122222051. The next prime is 1020122222123. The reversal of 1020122222121 is 1212222210201.

It is a happy number.

1020122222121 is a `hidden beast` number, since 1 + 0 + 201 + 222 + 221 + 21 = 666.

It is not a de Polignac number, because 1020122222121 - 2³⁸ = 745244315177 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1020122222094 and 1020122222103.

It is not an unprimeable number, because it can be changed into a prime (1020122222123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8560876 + ... + 8679218.

It is an arithmetic number, because the mean of its divisors is an integer number (24896619000).

Almost surely, 2^{1020122222121} is an apocalyptic number.

It is an amenable number.

1020122222121 is a deficient number, since it is larger than the sum of its proper divisors (573261393879).

1020122222121 is a wasteful number, since it uses less digits than its factorization.

1020122222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118591 (or 118585 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1020122222121 its reverse (1212222210201), we get a palindrome (2232344432322).

The spelling of 1020122222121 in words is "one trillion, twenty billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".