1021222221011 has 4 divisors (see below), whose sum is σ = 1044971575032. Its totient is φ = 997472866992.

The previous prime is 1021222220969. The next prime is 1021222221043. The reversal of 1021222221011 is 1101222221201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1021222221011 - 2¹⁰ = 1021222219987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021222221311) 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, 11874676946 + ... + 11874677031.

It is an arithmetic number, because the mean of its divisors is an integer number (261242893758).

Almost surely, 2^{1021222221011} is an apocalyptic number.

1021222221011 is a deficient number, since it is larger than the sum of its proper divisors (23749354021).

1021222221011 is an equidigital number, since it uses as much as digits as its factorization.

1021222221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23749354020.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1021222221011 its reverse (1101222221201), we get a palindrome (2122444442212).

The spelling of 1021222221011 in words is "one trillion, twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, eleven".