102001221222001 has 4 divisors (see below), whose sum is σ = 102029098028400. Its totient is φ = 101973344415604.

The previous prime is 102001221221971. The next prime is 102001221222029. The reversal of 102001221222001 is 100222122100201.

It is a happy number.

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 not a de Polignac number, because 102001221222001 - 2¹⁷ = 102001221090929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102001221222071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13938397711 + ... + 13938405028.

It is an arithmetic number, because the mean of its divisors is an integer number (25507274507100).

Almost surely, 2^{102001221222001} is an apocalyptic number.

It is an amenable number.

102001221222001 is a deficient number, since it is larger than the sum of its proper divisors (27876806399).

102001221222001 is an equidigital number, since it uses as much as digits as its factorization.

102001221222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27876806398.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102001221222001 its reverse (100222122100201), we get a palindrome (202223343322202).

The spelling of 102001221222001 in words is "one hundred two trillion, one billion, two hundred twenty-one million, two hundred twenty-two thousand, one".