1311220022022 has 96 divisors (see below), whose sum is σ = 2947157628480. Its totient is φ = 420823952640.

The previous prime is 1311220022009. The next prime is 1311220022039. The reversal of 1311220022022 is 2202200221131.

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

It is a junction number, because it is equal to n+sod(n) for n = 1311220021986 and 1311220022004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 332541783 + ... + 332545725.

It is an arithmetic number, because the mean of its divisors is an integer number (30699558630).

Almost surely, 2^{1311220022022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311220022022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473578814240).

1311220022022 is an abundant number, since it is smaller than the sum of its proper divisors (1635937606458).

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

1311220022022 is a wasteful number, since it uses less digits than its factorization.

1311220022022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5598 (or 5595 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1311220022022 its reverse (2202200221131), we get a palindrome (3513420243153).

The spelling of 1311220022022 in words is "one trillion, three hundred eleven billion, two hundred twenty million, twenty-two thousand, twenty-two".