1220221101010 has 32 divisors (see below), whose sum is σ = 2272811289840. Its totient is φ = 471117712128.

The previous prime is 1220221100951. The next prime is 1220221101019. The reversal of 1220221101010 is 101011220221.

It can be written as a sum of positive squares in 8 ways, for example, as 1067942428569 + 152278672441 = 1033413^2 + 390229^2 .

It is not an unprimeable number, because it can be changed into a prime (1220221101019) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 354444 + ... + 1601896.

Almost surely, 2^{1220221101010} is an apocalyptic number.

1220221101010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220221101010 is a deficient number, since it is larger than the sum of its proper divisors (1052590188830).

1220221101010 is a wasteful number, since it uses less digits than its factorization.

1220221101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250862.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220221101010 its reverse (101011220221), we get a palindrome (1321232321231).

It can be divided in two parts, 1220221 and 101010, that added together give a palindrome (1321231).

The spelling of 1220221101010 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, one hundred one thousand, ten".