1221022202101 has 8 divisors (see below), whose sum is σ = 1357364632064. Its totient is φ = 1090739435760.

The previous prime is 1221022202087. The next prime is 1221022202119. The reversal of 1221022202101 is 1012022201221.

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 1221022202101 - 2⁹ = 1221022201589 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 (1221022202171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1514915481 + ... + 1514916286.

It is an arithmetic number, because the mean of its divisors is an integer number (169670579008).

Almost surely, 2^{1221022202101} is an apocalyptic number.

It is an amenable number.

1221022202101 is a deficient number, since it is larger than the sum of its proper divisors (136342429963).

1221022202101 is a wasteful number, since it uses less digits than its factorization.

1221022202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3029831811.

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

Adding to 1221022202101 its reverse (1012022201221), we get a palindrome (2233044403322).

The spelling of 1221022202101 in words is "one trillion, two hundred twenty-one billion, twenty-two million, two hundred two thousand, one hundred one".