1221222200101 has 8 divisors (see below), whose sum is σ = 1234744356384. Its totient is φ = 1207763678160.

The previous prime is 1221222200069. The next prime is 1221222200117. The reversal of 1221222200101 is 1010022221221.

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 not a de Polignac number, because 1221222200101 - 2⁵ = 1221222200069 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 (1221222204101) 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, 15869991 + ... + 15946756.

It is an arithmetic number, because the mean of its divisors is an integer number (154343044548).

Almost surely, 2^{1221222200101} is an apocalyptic number.

It is an amenable number.

1221222200101 is a deficient number, since it is larger than the sum of its proper divisors (13522156283).

1221222200101 is a wasteful number, since it uses less digits than its factorization.

1221222200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31817171.

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

Adding to 1221222200101 its reverse (1010022221221), we get a palindrome (2231244421322).

The spelling of 1221222200101 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred thousand, one hundred one".