1021102012020 has 24 divisors (see below), whose sum is σ = 2859085633824. Its totient is φ = 272293869856.

The previous prime is 1021102011989. The next prime is 1021102012033. The reversal of 1021102012020 is 202102011201.

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 = 1021102011987 and 1021102012005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8509183374 + ... + 8509183493.

It is an arithmetic number, because the mean of its divisors is an integer number (119128568076).

Almost surely, 2^{1021102012020} is an apocalyptic number.

1021102012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021102012020 is an abundant number, since it is smaller than the sum of its proper divisors (1837983621804).

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

1021102012020 is a wasteful number, since it uses less digits than its factorization.

1021102012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17018366879 (or 17018366877 counting only the distinct ones).

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

Adding to 1021102012020 its reverse (202102011201), we get a palindrome (1223204023221).

The spelling of 1021102012020 in words is "one trillion, twenty-one billion, one hundred two million, twelve thousand, twenty".