1221112201010 has 32 divisors (see below), whose sum is σ = 2377415683440. Its totient is φ = 448903312128.

The previous prime is 1221112201003. The next prime is 1221112201031. The reversal of 1221112201010 is 101022111221.

It can be written as a sum of positive squares in 8 ways, for example, as 925788428041 + 295323772969 = 962179^2 + 543437^2 .

It is a super-2 number, since 2×1221112201010² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20479337 + ... + 20538876.

Almost surely, 2^{1221112201010} is an apocalyptic number.

1221112201010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221112201010 is a deficient number, since it is larger than the sum of its proper divisors (1156303482430).

1221112201010 is a wasteful number, since it uses less digits than its factorization.

1221112201010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41018462.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221112201010 its reverse (101022111221), we get a palindrome (1322134312231).

The spelling of 1221112201010 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, two hundred one thousand, ten".