1221199164652 has 24 divisors (see below), whose sum is σ = 2151547902000. Its totient is φ = 606471598656.

The previous prime is 1221199164593. The next prime is 1221199164659. The reversal of 1221199164652 is 2564619911221.

It is a happy number.

It is a super-2 number, since 2×1221199164652² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221199164596 and 1221199164605.

It is not an unprimeable number, because it can be changed into a prime (1221199164659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16587499 + ... + 16660957.

It is an arithmetic number, because the mean of its divisors is an integer number (89647829250).

Almost surely, 2^{1221199164652} is an apocalyptic number.

It is an amenable number.

1221199164652 is a deficient number, since it is larger than the sum of its proper divisors (930348737348).

1221199164652 is a wasteful number, since it uses less digits than its factorization.

1221199164652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101505 (or 101503 counting only the distinct ones).

The product of its digits is 466560, while the sum is 49.

The spelling of 1221199164652 in words is "one trillion, two hundred twenty-one billion, one hundred ninety-nine million, one hundred sixty-four thousand, six hundred fifty-two".