1361212226220 has 288 divisors, whose sum is σ = 4889745229824. Its totient is φ = 276830737920.

The previous prime is 1361212226189. The next prime is 1361212226221. The reversal of 1361212226220 is 226222121631.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1361212226221) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2103594 + ... + 2673486.

It is an arithmetic number, because the mean of its divisors is an integer number (16978282048).

Almost surely, 2^{1361212226220} is an apocalyptic number.

1361212226220 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 1361212226220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2444872614912).

1361212226220 is an abundant number, since it is smaller than the sum of its proper divisors (3528533003604).

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

1361212226220 is a wasteful number, since it uses less digits than its factorization.

1361212226220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569981 (or 569968 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 1361212226220 its reverse (226222121631), we get a palindrome (1587434347851).

The spelling of 1361212226220 in words is "one trillion, three hundred sixty-one billion, two hundred twelve million, two hundred twenty-six thousand, two hundred twenty".