1221120021202 has 16 divisors (see below), whose sum is σ = 1895037249600. Its totient is φ = 589445290000.

The previous prime is 1221120021157. The next prime is 1221120021203. The reversal of 1221120021202 is 2021200211221.

It is a happy number.

It is a super-2 number, since 2×1221120021202² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221120021203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519424 + ... + 1646827.

It is an arithmetic number, because the mean of its divisors is an integer number (118439828100).

Almost surely, 2^{1221120021202} is an apocalyptic number.

1221120021202 is a deficient number, since it is larger than the sum of its proper divisors (673917228398).

1221120021202 is a wasteful number, since it uses less digits than its factorization.

1221120021202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2176001.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221120021202 its reverse (2021200211221), we get a palindrome (3242320232423).

The spelling of 1221120021202 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, twenty-one thousand, two hundred two".