1220521213315 has 8 divisors (see below), whose sum is σ = 1465929670608. Its totient is φ = 975547494240.

The previous prime is 1220521213273. The next prime is 1220521213361. The reversal of 1220521213315 is 5133121250221.

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

It is not a de Polignac number, because 1220521213315 - 2¹⁵ = 1220521180547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108678376 + ... + 108689605.

It is an arithmetic number, because the mean of its divisors is an integer number (183241208826).

Almost surely, 2^{1220521213315} is an apocalyptic number.

1220521213315 is a deficient number, since it is larger than the sum of its proper divisors (245408457293).

1220521213315 is a wasteful number, since it uses less digits than its factorization.

1220521213315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217369109.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 1220521213315 its reverse (5133121250221), we get a palindrome (6353642463536).

The spelling of 1220521213315 in words is "one trillion, two hundred twenty billion, five hundred twenty-one million, two hundred thirteen thousand, three hundred fifteen".