1220205502 has 8 divisors (see below), whose sum is σ = 1830463200. Its totient is φ = 610051104.

The previous prime is 1220205463. The next prime is 1220205533. The reversal of 1220205502 is 2055020221.

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

It is a super-2 number, since 2×1220205502² = 2977802934222144008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220205502.

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 3 ways as a sum of consecutive naturals, for example, 19899 + ... + 53257.

It is an arithmetic number, because the mean of its divisors is an integer number (228807900).

Almost surely, 2^1220205502 is an apocalyptic number.

1220205502 is a deficient number, since it is larger than the sum of its proper divisors (610257698).

1220205502 is a wasteful number, since it uses less digits than its factorization.

1220205502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51650.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1220205502 is about 34931.4400218485. The cubic root of 1220205502 is about 1068.5897226812.

Adding to 1220205502 its reverse (2055020221), we get a palindrome (3275225723).

The spelling of 1220205502 in words is "one billion, two hundred twenty million, two hundred five thousand, five hundred two".