1022001221021 has 4 divisors (see below), whose sum is σ = 1114910422944. Its totient is φ = 929092019100.

The previous prime is 1022001220967. The next prime is 1022001221023. The reversal of 1022001221021 is 1201221002201.

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 1022001221021 - 2³⁰ = 1020927479197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022001220987 and 1022001221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022001221023) 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, 46454600945 + ... + 46454600966.

It is an arithmetic number, because the mean of its divisors is an integer number (278727605736).

Almost surely, 2^{1022001221021} is an apocalyptic number.

1022001221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1022001221021 is a deficient number, since it is larger than the sum of its proper divisors (92909201923).

1022001221021 is an equidigital number, since it uses as much as digits as its factorization.

1022001221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92909201922.

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

Adding to 1022001221021 its reverse (1201221002201), we get a palindrome (2223222223222).

The spelling of 1022001221021 in words is "one trillion, twenty-two billion, one million, two hundred twenty-one thousand, twenty-one".