1211222001060 has 108 divisors (see below), whose sum is σ = 3694468767444. Its totient is φ = 321206480640.

The previous prime is 1211222001053. The next prime is 1211222001061. The reversal of 1211222001060 is 601002221121.

It can be written as a sum of positive squares in 6 ways, for example, as 866105699904 + 345116301156 = 930648^2 + 587466^2 .

It is a super-2 number, since 2×1211222001060² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1211222001061) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5794282 + ... + 5999678.

It is an arithmetic number, because the mean of its divisors is an integer number (34208044143).

Almost surely, 2^{1211222001060} is an apocalyptic number.

1211222001060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211222001060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1847234383722).

1211222001060 is an abundant number, since it is smaller than the sum of its proper divisors (2483246766384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211222001060 is a wasteful number, since it uses less digits than its factorization.

1211222001060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205774 (or 205588 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1211222001060 its reverse (601002221121), we get a palindrome (1812224222181).

The spelling of 1211222001060 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, one thousand, sixty".