1201121222221 has 8 divisors (see below), whose sum is σ = 1202343816960. Its totient is φ = 1199899244352.

The previous prime is 1201121222219. The next prime is 1201121222243. The reversal of 1201121222221 is 1222221211021.

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 1201121222221 - 2¹ = 1201121222219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201121225221) 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, 3793221 + ... + 4097653.

It is an arithmetic number, because the mean of its divisors is an integer number (150292977120).

Almost surely, 2^{1201121222221} is an apocalyptic number.

It is an amenable number.

1201121222221 is a deficient number, since it is larger than the sum of its proper divisors (1222594739).

1201121222221 is a wasteful number, since it uses less digits than its factorization.

1201121222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308435.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1201121222221 its reverse (1222221211021), we get a palindrome (2423342433242).

The spelling of 1201121222221 in words is "one trillion, two hundred one billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".