1021121002020 has 48 divisors (see below), whose sum is σ = 3267587207808. Its totient is φ = 233399086080.

The previous prime is 1021121002019. The next prime is 1021121002063. The reversal of 1021121002020 is 202001211201.

It is a super-3 number, since 3×1021121002020³ (a number of 37 digits) contains 333 as substring.

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 = 1021121001987 and 1021121002005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1215619821 + ... + 1215620660.

It is an arithmetic number, because the mean of its divisors is an integer number (68074733496).

Almost surely, 2^{1021121002020} is an apocalyptic number.

1021121002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021121002020 is an abundant number, since it is smaller than the sum of its proper divisors (2246466205788).

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

1021121002020 is a wasteful number, since it uses less digits than its factorization.

1021121002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431240500 (or 2431240498 counting only the distinct ones).

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

Adding to 1021121002020 its reverse (202001211201), we get a palindrome (1223122213221).

The spelling of 1021121002020 in words is "one trillion, twenty-one billion, one hundred twenty-one million, two thousand, twenty".