1010012021020 has 48 divisors (see below), whose sum is σ = 2146798080000. Its totient is φ = 399113523200.

The previous prime is 1010012020987. The next prime is 1010012021063. The reversal of 1010012021020 is 201202100101.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1010012020988 and 1010012021006.

It is a congruent number.

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, 350181 + ... + 1463779.

It is an arithmetic number, because the mean of its divisors is an integer number (44724960000).

Almost surely, 2^{1010012021020} is an apocalyptic number.

1010012021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1010012021020 is an abundant number, since it is smaller than the sum of its proper divisors (1136786058980).

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

1010012021020 is a wasteful number, since it uses less digits than its factorization.

1010012021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114158 (or 1114156 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1010012021020 its reverse (201202100101), we get a palindrome (1211214121121).

The spelling of 1010012021020 in words is "one trillion, ten billion, twelve million, twenty-one thousand, twenty".