1220215435652 has 24 divisors (see below), whose sum is σ = 2178218631960. Its totient is φ = 597939471360.

The previous prime is 1220215435619. The next prime is 1220215435679. The reversal of 1220215435652 is 2565345120221.

It can be written as a sum of positive squares in 4 ways, for example, as 235861750336 + 984353685316 = 485656^2 + 992146^2 .

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, 8959277 + ... + 9094452.

It is an arithmetic number, because the mean of its divisors is an integer number (90759109665).

Almost surely, 2^{1220215435652} is an apocalyptic number.

It is an amenable number.

1220215435652 is a deficient number, since it is larger than the sum of its proper divisors (958003196308).

1220215435652 is a wasteful number, since it uses less digits than its factorization.

1220215435652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18054071 (or 18054069 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 1220215435652 in words is "one trillion, two hundred twenty billion, two hundred fifteen million, four hundred thirty-five thousand, six hundred fifty-two".