1221210201022 has 16 divisors (see below), whose sum is σ = 2095028000352. Its totient is φ = 522994600800.

The previous prime is 1221210200993. The next prime is 1221210201047. The reversal of 1221210201022 is 2201020121221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1221210200987 and 1221210201005.

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, 31746729 + ... + 31785172.

It is an arithmetic number, because the mean of its divisors is an integer number (130939250022).

Almost surely, 2^{1221210201022} is an apocalyptic number.

1221210201022 is a deficient number, since it is larger than the sum of its proper divisors (873817799330).

1221210201022 is a wasteful number, since it uses less digits than its factorization.

1221210201022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63533283.

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

Adding to 1221210201022 its reverse (2201020121221), we get a palindrome (3422230322243).

The spelling of 1221210201022 in words is "one trillion, two hundred twenty-one billion, two hundred ten million, two hundred one thousand, twenty-two".