1220101550 has 12 divisors (see below), whose sum is σ = 2269388976. Its totient is φ = 488040600.

The previous prime is 1220101489. The next prime is 1220101591. The reversal of 1220101550 is 551010221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12200966 + ... + 12201065.

It is an arithmetic number, because the mean of its divisors is an integer number (189115748).

Almost surely, 2^1220101550 is an apocalyptic number.

1220101550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220101550 is a deficient number, since it is larger than the sum of its proper divisors (1049287426).

1220101550 is a wasteful number, since it uses less digits than its factorization.

1220101550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24402043 (or 24402038 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 1220101550 is about 34929.9520469181. The cubic root of 1220101550 is about 1068.5593766471.

Adding to 1220101550 its reverse (551010221), we get a palindrome (1771111771).

The spelling of 1220101550 in words is "one billion, two hundred twenty million, one hundred one thousand, five hundred fifty".