1221202200001 has 8 divisors (see below), whose sum is σ = 1395666581760. Its totient is φ = 1046739549408.

The previous prime is 1221202199977. The next prime is 1221202200041. The reversal of 1221202200001 is 1000022021221.

It is a happy number.

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

It is not a de Polignac number, because 1221202200001 - 2³¹ = 1219054716353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221202200041) 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, 1963005 + ... + 2509141.

It is an arithmetic number, because the mean of its divisors is an integer number (174458322720).

Almost surely, 2^{1221202200001} is an apocalyptic number.

It is an amenable number.

1221202200001 is a deficient number, since it is larger than the sum of its proper divisors (174464381759).

1221202200001 is an equidigital number, since it uses as much as digits as its factorization.

1221202200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865583.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1221202200001 its reverse (1000022021221), we get a palindrome (2221224221222).

The spelling of 1221202200001 in words is "one trillion, two hundred twenty-one billion, two hundred two million, two hundred thousand, one".