1021222220101 has 4 divisors (see below), whose sum is σ = 1024548677152. Its totient is φ = 1017895763052.

The previous prime is 1021222220071. The next prime is 1021222220129. The reversal of 1021222220101 is 1010222221201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021222220101 - 2⁷ = 1021222219973 is a prime.

It is a super-5 number, since 5×1021222220101⁵ (a number of 61 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021222224101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1663228065 + ... + 1663228678.

It is an arithmetic number, because the mean of its divisors is an integer number (256137169288).

Almost surely, 2^{1021222220101} is an apocalyptic number.

It is an amenable number.

1021222220101 is a deficient number, since it is larger than the sum of its proper divisors (3326457051).

1021222220101 is an equidigital number, since it uses as much as digits as its factorization.

1021222220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326457050.

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

Adding to 1021222220101 its reverse (1010222221201), we get a palindrome (2031444441302).

The spelling of 1021222220101 in words is "one trillion, twenty-one billion, two hundred twenty-two million, two hundred twenty thousand, one hundred one".