10203120020020 has 48 divisors (see below), whose sum is σ = 21500179536528. Its totient is φ = 4067230003200.

The previous prime is 10203120019987. The next prime is 10203120020123. The reversal of 10203120020020 is 2002002130201.

It can be written as a sum of positive squares in 8 ways, for example, as 3235990840996 + 6967129179024 = 1798886^2 + 2639532^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26104272 + ... + 26492248.

It is an arithmetic number, because the mean of its divisors is an integer number (447920407011).

Almost surely, 2^{10203120020020} is an apocalyptic number.

10203120020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10203120020020 is an abundant number, since it is smaller than the sum of its proper divisors (11297059516508).

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

10203120020020 is a wasteful number, since it uses less digits than its factorization.

10203120020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392500 (or 392498 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 10203120020020 its reverse (2002002130201), we get a palindrome (12205122150221).

The spelling of 10203120020020 in words is "ten trillion, two hundred three billion, one hundred twenty million, twenty thousand, twenty".