1021120002221 has 8 divisors (see below), whose sum is σ = 1113956423424. Its totient is φ = 928284802720.

The previous prime is 1021120002163. The next prime is 1021120002257. The reversal of 1021120002221 is 1222000211201.

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

It is not a de Polignac number, because 1021120002221 - 2³⁴ = 1003940133037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021120002196 and 1021120002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021120052221) 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, 2962340 + ... + 3289026.

It is an arithmetic number, because the mean of its divisors is an integer number (139244552928).

Almost surely, 2^{1021120002221} is an apocalyptic number.

1021120002221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021120002221 is a deficient number, since it is larger than the sum of its proper divisors (92836421203).

1021120002221 is a wasteful number, since it uses less digits than its factorization.

1021120002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610851.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1021120002221 its reverse (1222000211201), we get a palindrome (2243120213422).

The spelling of 1021120002221 in words is "one trillion, twenty-one billion, one hundred twenty million, two thousand, two hundred twenty-one".