1020020111121 has 64 divisors (see below), whose sum is σ = 1522503714816. Its totient is φ = 602230464000.

The previous prime is 1020020111093. The next prime is 1020020111161. The reversal of 1020020111121 is 1211110200201.

It is not a de Polignac number, because 1020020111121 - 2¹⁸ = 1020019848977 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1020020111097 and 1020020111106.

It is not an unprimeable number, because it can be changed into a prime (1020020111161) 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, 237377445 + ... + 237381741.

It is an arithmetic number, because the mean of its divisors is an integer number (23789120544).

Almost surely, 2^{1020020111121} is an apocalyptic number.

1020020111121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020020111121 is a deficient number, since it is larger than the sum of its proper divisors (502483603695).

1020020111121 is a wasteful number, since it uses less digits than its factorization.

1020020111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5542.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1020020111121 its reverse (1211110200201), we get a palindrome (2231130311322).

The spelling of 1020020111121 in words is "one trillion, twenty billion, twenty million, one hundred eleven thousand, one hundred twenty-one".