1203123021220 has 48 divisors (see below), whose sum is σ = 2529771910848. Its totient is φ = 480637503360.

The previous prime is 1203123021103. The next prime is 1203123021251. The reversal of 1203123021220 is 221203213021.

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, 55211167 + ... + 55232953.

It is an arithmetic number, because the mean of its divisors is an integer number (52703581476).

Almost surely, 2^{1203123021220} is an apocalyptic number.

1203123021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1203123021220 is an abundant number, since it is smaller than the sum of its proper divisors (1326648889628).

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

1203123021220 is a wasteful number, since it uses less digits than its factorization.

1203123021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25180 (or 25178 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1203123021220 its reverse (221203213021), we get a palindrome (1424326234241).

The spelling of 1203123021220 in words is "one trillion, two hundred three billion, one hundred twenty-three million, twenty-one thousand, two hundred twenty".