1201212222221 has 8 divisors (see below), whose sum is σ = 1310480525088. Its totient is φ = 1091955118000.

The previous prime is 1201212222209. The next prime is 1201212222227. The reversal of 1201212222221 is 1222222121021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201212222221 - 2³⁰ = 1200138480397 is a prime.

It is a super-2 number, since 2×1201212222221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201212222193 and 1201212222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201212222227) 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, 2574590 + ... + 3005151.

It is an arithmetic number, because the mean of its divisors is an integer number (163810065636).

Almost surely, 2^{1201212222221} is an apocalyptic number.

1201212222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201212222221 is a deficient number, since it is larger than the sum of its proper divisors (109268302867).

1201212222221 is a wasteful number, since it uses less digits than its factorization.

1201212222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5599323.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1201212222221 its reverse (1222222121021), we get a palindrome (2423434343242).

The spelling of 1201212222221 in words is "one trillion, two hundred one billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twenty-one".