1220211111010 has 32 divisors (see below), whose sum is σ = 2250806754672. Its totient is φ = 475998673920.

The previous prime is 1220211110947. The next prime is 1220211111017. The reversal of 1220211111010 is 101111120221.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 335631359569 + 884579751441 = 579337^2 + 940521^2 .

It is not an unprimeable number, because it can be changed into a prime (1220211111017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514372 + ... + 1644688.

Almost surely, 2^{1220211111010} is an apocalyptic number.

1220211111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220211111010 is a deficient number, since it is larger than the sum of its proper divisors (1030595643662).

1220211111010 is a wasteful number, since it uses less digits than its factorization.

1220211111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132998.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1220211111010 its reverse (101111120221), we get a palindrome (1321322231231).

The spelling of 1220211111010 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred eleven thousand, ten".