1221123000030 has 64 divisors (see below), whose sum is σ = 2942773936128. Its totient is φ = 324291755520.

The previous prime is 1221123000011. The next prime is 1221123000049. The reversal of 1221123000030 is 300003211221.

It is an interprime number because it is at equal distance from previous prime (1221123000011) and next prime (1221123000049).

It is a super-2 number, since 2×1221123000030² (a number of 25 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1221122999973 and 1221123000009.

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 31 ways as a sum of consecutive naturals, for example, 19619139 + ... + 19681281.

It is an arithmetic number, because the mean of its divisors is an integer number (45980842752).

Almost surely, 2^{1221123000030} is an apocalyptic number.

1221123000030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221123000030 is an abundant number, since it is smaller than the sum of its proper divisors (1721650936098).

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

1221123000030 is a wasteful number, since it uses less digits than its factorization.

1221123000030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64841.

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

Adding to 1221123000030 its reverse (300003211221), we get a palindrome (1521126211251).

The spelling of 1221123000030 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-three million, thirty", and thus it is an aban number.