1221302022213 has 32 divisors (see below), whose sum is σ = 2008573670656. Its totient is φ = 642793563648.

The previous prime is 1221302022211. The next prime is 1221302022263. The reversal of 1221302022213 is 3122202031221.

It is not a de Polignac number, because 1221302022213 - 2¹ = 1221302022211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1221302022213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221302022211) 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 31 ways as a sum of consecutive naturals, for example, 4769806 + ... + 5019327.

It is an arithmetic number, because the mean of its divisors is an integer number (62767927208).

Almost surely, 2^{1221302022213} is an apocalyptic number.

1221302022213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1221302022213 is a deficient number, since it is larger than the sum of its proper divisors (787271648443).

1221302022213 is a wasteful number, since it uses less digits than its factorization.

1221302022213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9789613.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1221302022213 its reverse (3122202031221), we get a palindrome (4343504053434).

The spelling of 1221302022213 in words is "one trillion, two hundred twenty-one billion, three hundred two million, twenty-two thousand, two hundred thirteen".