1225212110120 has 32 divisors (see below), whose sum is σ = 2762707174920. Its totient is φ = 489021745920.

The previous prime is 1225212110113. The next prime is 1225212110123. The reversal of 1225212110120 is 210112125221.

It can be written as a sum of positive squares in 4 ways, for example, as 677141368996 + 548070741124 = 822886^2 + 740318^2 .

It is a super-2 number, since 2×1225212110120² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1225212110092 and 1225212110101.

It is not an unprimeable number, because it can be changed into a prime (1225212110123) 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, 33203147 + ... + 33240026.

Almost surely, 2^{1225212110120} is an apocalyptic number.

1225212110120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225212110120 is an abundant number, since it is smaller than the sum of its proper divisors (1537495064800).

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

1225212110120 is a wasteful number, since it uses less digits than its factorization.

1225212110120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66443645 (or 66443641 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 1225212110120 its reverse (210112125221), we get a palindrome (1435324235341).

The spelling of 1225212110120 in words is "one trillion, two hundred twenty-five billion, two hundred twelve million, one hundred ten thousand, one hundred twenty".