10011021001020 has 72 divisors (see below), whose sum is σ = 32702668610976. Its totient is φ = 2464251322752.

The previous prime is 10011021000989. The next prime is 10011021001039. The reversal of 10011021001020 is 2010012011001.

It is a happy number.

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 = 10011021000993 and 10011021001011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2139104712 + ... + 2139109391.

It is an arithmetic number, because the mean of its divisors is an integer number (454203730708).

Almost surely, 2^{10011021001020} is an apocalyptic number.

10011021001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10011021001020 is an abundant number, since it is smaller than the sum of its proper divisors (22691647609956).

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

10011021001020 is a wasteful number, since it uses less digits than its factorization.

10011021001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4278214131 (or 4278214126 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10011021001020 its reverse (2010012011001), we get a palindrome (12021033012021).

The spelling of 10011021001020 in words is "ten trillion, eleven billion, twenty-one million, one thousand, twenty".