1021222101 has 4 divisors (see below), whose sum is σ = 1361629472. Its totient is φ = 680814732.

The previous prime is 1021222087. The next prime is 1021222133. The reversal of 1021222101 is 1012221201.

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 not a de Polignac number, because 1021222101 - 2¹⁰ = 1021221077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021222141) 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 3 ways as a sum of consecutive naturals, for example, 170203681 + ... + 170203686.

It is an arithmetic number, because the mean of its divisors is an integer number (340407368).

Almost surely, 2^1021222101 is an apocalyptic number.

It is an amenable number.

1021222101 is a deficient number, since it is larger than the sum of its proper divisors (340407371).

1021222101 is an equidigital number, since it uses as much as digits as its factorization.

1021222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340407370.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1021222101 is about 31956.5658511674. The cubic root of 1021222101 is about 1007.0245734923.

Adding to 1021222101 its reverse (1012221201), we get a palindrome (2033443302).

The spelling of 1021222101 in words is "one billion, twenty-one million, two hundred twenty-two thousand, one hundred one".