1010020021020 has 72 divisors (see below), whose sum is σ = 3063848345376. Its totient is φ = 269328039552.

The previous prime is 1010020020979. The next prime is 1010020021033. The reversal of 1010020021020 is 201200200101.

It is a super-2 number, since 2×1010020021020² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1010020020993 and 1010020021011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5154969 + ... + 5347311.

Almost surely, 2^{1010020021020} is an apocalyptic number.

1010020021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1010020021020 is an abundant number, since it is smaller than the sum of its proper divisors (2053828324356).

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

1010020021020 is a wasteful number, since it uses less digits than its factorization.

1010020021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221531 (or 221526 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1010020021020 its reverse (201200200101), we get a palindrome (1211220221121).

The spelling of 1010020021020 in words is "one trillion, ten billion, twenty million, twenty-one thousand, twenty".