1020000122221 has 8 divisors (see below), whose sum is σ = 1080113590080. Its totient is φ = 960529579488.

The previous prime is 1020000122209. The next prime is 1020000122233. The reversal of 1020000122221 is 1222210000201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1020000122209) and next prime (1020000122233).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020000122221 - 2⁵ = 1020000122189 is a prime.

It is a Duffinian number.

1020000122221 is a modest number, since divided by 122221 gives 102 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020000122321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160728016 + ... + 160734361.

It is an arithmetic number, because the mean of its divisors is an integer number (135014198760).

Almost surely, 2^{1020000122221} is an apocalyptic number.

It is an amenable number.

1020000122221 is a deficient number, since it is larger than the sum of its proper divisors (60113467859).

1020000122221 is a wasteful number, since it uses less digits than its factorization.

1020000122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321462563.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1020000122221 its reverse (1222210000201), we get a palindrome (2242210122422).

The spelling of 1020000122221 in words is "one trillion, twenty billion, one hundred twenty-two thousand, two hundred twenty-one".