1222011121220 has 24 divisors (see below), whose sum is σ = 2566464603864. Its totient is φ = 488758496256.

The previous prime is 1222011121213. The next prime is 1222011121223. The reversal of 1222011121220 is 221211102221.

It can be written as a sum of positive squares in 4 ways, for example, as 21220331584 + 1200790789636 = 145672^2 + 1095806^2 .

It is a super-2 number, since 2×1222011121220² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1222011121223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2653547 + ... + 3079826.

It is an arithmetic number, because the mean of its divisors is an integer number (106936025161).

Almost surely, 2^{1222011121220} is an apocalyptic number.

1222011121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222011121220 is an abundant number, since it is smaller than the sum of its proper divisors (1344453482644).

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

1222011121220 is a wasteful number, since it uses less digits than its factorization.

1222011121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5744039 (or 5744037 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1222011121220 its reverse (221211102221), we get a palindrome (1443222223441).

It can be divided in two parts, 122201 and 1121220, that added together give a palindrome (1243421).

The spelling of 1222011121220 in words is "one trillion, two hundred twenty-two billion, eleven million, one hundred twenty-one thousand, two hundred twenty".