1222100221001 has 4 divisors (see below), whose sum is σ = 1333200241104. Its totient is φ = 1111000200900.

The previous prime is 1222100220977. The next prime is 1222100221003. The reversal of 1222100221001 is 1001220012221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222100221001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1222100221003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55550010035 + ... + 55550010056.

It is an arithmetic number, because the mean of its divisors is an integer number (333300060276).

Almost surely, 2^{1222100221001} is an apocalyptic number.

1222100221001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222100221001 is a deficient number, since it is larger than the sum of its proper divisors (111100020103).

1222100221001 is a wasteful number, since it uses less digits than its factorization.

1222100221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111100020102.

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

Adding to 1222100221001 its reverse (1001220012221), we get a palindrome (2223320233222).

The spelling of 1222100221001 in words is "one trillion, two hundred twenty-two billion, one hundred million, two hundred twenty-one thousand, one".