1221101102022 has 16 divisors (see below), whose sum is σ = 2444570986752. Its totient is φ = 406638903560.

The previous prime is 1221101101991. The next prime is 1221101102027. The reversal of 1221101102022 is 2202011011221.

It is a junction number, because it is equal to n+sod(n) for n = 1221101101992 and 1221101102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221101102027) 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, 98692578 + ... + 98704949.

It is an arithmetic number, because the mean of its divisors is an integer number (152785686672).

Almost surely, 2^{1221101102022} is an apocalyptic number.

1221101102022 is an abundant number, since it is smaller than the sum of its proper divisors (1223469884730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221101102022 is a wasteful number, since it uses less digits than its factorization.

1221101102022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197398563.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221101102022 its reverse (2202011011221), we get a palindrome (3423112113243).

The spelling of 1221101102022 in words is "one trillion, two hundred twenty-one billion, one hundred one million, one hundred two thousand, twenty-two".