203021113020 has 48 divisors (see below), whose sum is σ = 620137219968. Its totient is φ = 49217239360.

The previous prime is 203021113013. The next prime is 203021113027. The reversal of 203021113020 is 20311120302.

It is an interprime number because it is at equal distance from previous prime (203021113013) and next prime (203021113027).

It is a super-2 number, since 2×203021113020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203021113027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153803214 + ... + 153804533.

It is an arithmetic number, because the mean of its divisors is an integer number (12919525416).

Almost surely, 2^203021113020 is an apocalyptic number.

203021113020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203021113020 is an abundant number, since it is smaller than the sum of its proper divisors (417116106948).

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

203021113020 is a wasteful number, since it uses less digits than its factorization.

203021113020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307607770 (or 307607768 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 203021113020 its reverse (20311120302), we get a palindrome (223332233322).

It can be divided in two parts, 2030211 and 13020, that added together give a triangular number (2043231 = T₂₀₂₁).

The spelling of 203021113020 in words is "two hundred three billion, twenty-one million, one hundred thirteen thousand, twenty".