1220021202111 has 24 divisors (see below), whose sum is σ = 1694750342544. Its totient is φ = 780524294400.

The previous prime is 1220021202089. The next prime is 1220021202131. The reversal of 1220021202111 is 1112021200221.

It is not a de Polignac number, because 1220021202111 - 2⁹ = 1220021201599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220021202131) 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 23 ways as a sum of consecutive naturals, for example, 1734840 + ... + 2334461.

It is an arithmetic number, because the mean of its divisors is an integer number (70614597606).

Almost surely, 2^{1220021202111} is an apocalyptic number.

1220021202111 is a deficient number, since it is larger than the sum of its proper divisors (474729140433).

1220021202111 is an equidigital number, since it uses as much as digits as its factorization.

1220021202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069451 (or 4069414 counting only the distinct ones).

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

Adding to 1220021202111 its reverse (1112021200221), we get a palindrome (2332042402332).

The spelling of 1220021202111 in words is "one trillion, two hundred twenty billion, twenty-one million, two hundred two thousand, one hundred eleven".