1221302220302 has 16 divisors (see below), whose sum is σ = 1834277596992. Its totient is φ = 609876637440.

The previous prime is 1221302220287. The next prime is 1221302220323. The reversal of 1221302220302 is 2030222031221.

It is a happy number.

It is a super-2 number, since 2×1221302220302² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8930363 + ... + 9066089.

It is an arithmetic number, because the mean of its divisors is an integer number (114642349812).

Almost surely, 2^{1221302220302} is an apocalyptic number.

1221302220302 is a deficient number, since it is larger than the sum of its proper divisors (612975376690).

1221302220302 is a wasteful number, since it uses less digits than its factorization.

1221302220302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141403.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 1221302220302 its reverse (2030222031221), we get a palindrome (3251524251523).

It can be divided in two parts, 122130 and 2220302, that added together give a palindrome (2342432).

The spelling of 1221302220302 in words is "one trillion, two hundred twenty-one billion, three hundred two million, two hundred twenty thousand, three hundred two".