1201220010221 has 12 divisors (see below), whose sum is σ = 1508970592416. Its totient is φ = 936015591720.

The previous prime is 1201220010161. The next prime is 1201220010229. The reversal of 1201220010221 is 1220100221021.

It is not a de Polignac number, because 1201220010221 - 2³⁸ = 926342103277 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1201220010196 and 1201220010205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201220010229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 709101875 + ... + 709103568.

It is an arithmetic number, because the mean of its divisors is an integer number (125747549368).

Almost surely, 2^{1201220010221} is an apocalyptic number.

1201220010221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201220010221 is a deficient number, since it is larger than the sum of its proper divisors (307750582195).

1201220010221 is a wasteful number, since it uses less digits than its factorization.

1201220010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418205472 (or 1418205461 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1201220010221 its reverse (1220100221021), we get a palindrome (2421320231242).

The spelling of 1201220010221 in words is "one trillion, two hundred one billion, two hundred twenty million, ten thousand, two hundred twenty-one".