1021021102020 has 96 divisors (see below), whose sum is σ = 2874548920320. Its totient is φ = 270778746240.

The previous prime is 1021021102009. The next prime is 1021021102043. The reversal of 1021021102020 is 202011201201.

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 = 1021021101987 and 1021021102005.

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, 59342739 + ... + 59359941.

It is an arithmetic number, because the mean of its divisors is an integer number (29943217920).

Almost surely, 2^{1021021102020} is an apocalyptic number.

1021021102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021021102020 is an abundant number, since it is smaller than the sum of its proper divisors (1853527818300).

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

1021021102020 is a wasteful number, since it uses less digits than its factorization.

1021021102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22585 (or 22583 counting only the distinct ones).

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

Adding to 1021021102020 its reverse (202011201201), we get a palindrome (1223032303221).

The spelling of 1021021102020 in words is "one trillion, twenty-one billion, twenty-one million, one hundred two thousand, twenty".