1221511515230 has 8 divisors (see below), whose sum is σ = 2198720727432. Its totient is φ = 488604606088.

The previous prime is 1221511515209. The next prime is 1221511515233. The reversal of 1221511515230 is 325151151221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1221511515193 and 1221511515202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221511515233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61075575752 + ... + 61075575771.

It is an arithmetic number, because the mean of its divisors is an integer number (274840090929).

Almost surely, 2^{1221511515230} is an apocalyptic number.

1221511515230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221511515230 is a deficient number, since it is larger than the sum of its proper divisors (977209212202).

1221511515230 is a wasteful number, since it uses less digits than its factorization.

1221511515230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122151151530.

The product of its (nonzero) digits is 3000, while the sum is 29.

Adding to 1221511515230 its reverse (325151151221), we get a palindrome (1546662666451).

The spelling of 1221511515230 in words is "one trillion, two hundred twenty-one billion, five hundred eleven million, five hundred fifteen thousand, two hundred thirty".