1020121210020 has 96 divisors (see below), whose sum is σ = 3116694583296. Its totient is φ = 247247510400.

The previous prime is 1020121209997. The next prime is 1020121210033. The reversal of 1020121210020 is 200121210201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1020121209978 and 1020121210005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2861727 + ... + 3198393.

It is an arithmetic number, because the mean of its divisors is an integer number (32465568576).

Almost surely, 2^{1020121210020} is an apocalyptic number.

1020121210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020121210020 is an abundant number, since it is smaller than the sum of its proper divisors (2096573373276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020121210020 is a wasteful number, since it uses less digits than its factorization.

1020121210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341281 (or 341279 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1020121210020 its reverse (200121210201), we get a palindrome (1220242420221).

The spelling of 1020121210020 in words is "one trillion, twenty billion, one hundred twenty-one million, two hundred ten thousand, twenty".