1010101010221 has 4 divisors (see below), whose sum is σ = 1054018445472. Its totient is φ = 966183574972.

The previous prime is 1010101010203. The next prime is 1010101010297. The reversal of 1010101010221 is 1220101010101.

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 1010101010221 - 2³³ = 1001511075629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010101010198 and 1010101010207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010101010921) 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, 21958717591 + ... + 21958717636.

It is an arithmetic number, because the mean of its divisors is an integer number (263504611368).

Almost surely, 2^{1010101010221} is an apocalyptic number.

It is an amenable number.

1010101010221 is a deficient number, since it is larger than the sum of its proper divisors (43917435251).

1010101010221 is an equidigital number, since it uses as much as digits as its factorization.

1010101010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43917435250.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1010101010221 its reverse (1220101010101), we get a palindrome (2230202020322).

The spelling of 1010101010221 in words is "one trillion, ten billion, one hundred one million, ten thousand, two hundred twenty-one".