1221202202201 has 8 divisors (see below), whose sum is σ = 1222934174784. Its totient is φ = 1219470833520.

The previous prime is 1221202202177. The next prime is 1221202202267. The reversal of 1221202202201 is 1022022021221.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221202202201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221202202201.

It is not an unprimeable number, because it can be changed into a prime (1221202202291) 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, 3975995 + ... + 4272111.

It is an arithmetic number, because the mean of its divisors is an integer number (152866771848).

Almost surely, 2^{1221202202201} is an apocalyptic number.

It is an amenable number.

1221202202201 is a deficient number, since it is larger than the sum of its proper divisors (1731972583).

1221202202201 is an equidigital number, since it uses as much as digits as its factorization.

1221202202201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301951.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1221202202201 its reverse (1022022021221), we get a palindrome (2243224223422).

The spelling of 1221202202201 in words is "one trillion, two hundred twenty-one billion, two hundred two million, two hundred two thousand, two hundred one".