1221203200030 has 48 divisors (see below), whose sum is σ = 2443313814480. Its totient is φ = 439084257920.

The previous prime is 1221203199991. The next prime is 1221203200031. The reversal of 1221203200030 is 300023021221.

It is a junction number, because it is equal to n+sod(n) for n = 1221203199977 and 1221203200013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221203200031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5562304 + ... + 5777683.

It is an arithmetic number, because the mean of its divisors is an integer number (50902371135).

Almost surely, 2^{1221203200030} is an apocalyptic number.

1221203200030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221203200030 is an abundant number, since it is smaller than the sum of its proper divisors (1222110614450).

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

1221203200030 is a wasteful number, since it uses less digits than its factorization.

1221203200030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11340105 (or 11340094 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 1221203200030 its reverse (300023021221), we get a palindrome (1521226221251).

The spelling of 1221203200030 in words is "one trillion, two hundred twenty-one billion, two hundred three million, two hundred thousand, thirty".