203112120032220 has 144 divisors (see below), whose sum is σ = 661594245838848. Its totient is φ = 46423588498560.

The previous prime is 203112120032191. The next prime is 203112120032249. The reversal of 203112120032220 is 22230021211302.

It is an interprime number because it is at equal distance from previous prime (203112120032191) and next prime (203112120032249).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65946825 + ... + 68958015.

It is an arithmetic number, because the mean of its divisors is an integer number (4594404484992).

Almost surely, 2^{203112120032220} is an apocalyptic number.

203112120032220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203112120032220 is an abundant number, since it is smaller than the sum of its proper divisors (458482125806628).

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

203112120032220 is a wasteful number, since it uses less digits than its factorization.

203112120032220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3034160 (or 3034151 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 203112120032220 its reverse (22230021211302), we get a palindrome (225342141243522).

The spelling of 203112120032220 in words is "two hundred three trillion, one hundred twelve billion, one hundred twenty million, thirty-two thousand, two hundred twenty".