1321202120022 has 96 divisors (see below), whose sum is σ = 3117121330752. Its totient is φ = 402746867712.

The previous prime is 1321202119999. The next prime is 1321202120027. The reversal of 1321202120022 is 2200212021231.

1321202120022 is a `hidden beast` number, since 1 + 321 + 202 + 120 + 0 + 22 = 666.

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 = 1321202119977 and 1321202120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321202120027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8333718 + ... + 8490774.

It is an arithmetic number, because the mean of its divisors is an integer number (32470013862).

Almost surely, 2^{1321202120022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321202120022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1558560665376).

1321202120022 is an abundant number, since it is smaller than the sum of its proper divisors (1795919210730).

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

1321202120022 is a wasteful number, since it uses less digits than its factorization.

1321202120022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157862 (or 157859 counting only the distinct ones).

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

Adding to 1321202120022 its reverse (2200212021231), we get a palindrome (3521414141253).

The spelling of 1321202120022 in words is "one trillion, three hundred twenty-one billion, two hundred two million, one hundred twenty thousand, twenty-two".