1022000120021 has 16 divisors (see below), whose sum is σ = 1103469903360. Its totient is φ = 943632560640.

The previous prime is 1022000119991. The next prime is 1022000120039. The reversal of 1022000120021 is 1200210002201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1022000120021 - 2²⁶ = 1021933011157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1022000119984 and 1022000120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022000120321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2669381 + ... + 3028133.

It is an arithmetic number, because the mean of its divisors is an integer number (68966868960).

Almost surely, 2^{1022000120021} is an apocalyptic number.

It is an amenable number.

1022000120021 is a deficient number, since it is larger than the sum of its proper divisors (81469783339).

1022000120021 is a wasteful number, since it uses less digits than its factorization.

1022000120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363076.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1022000120021 its reverse (1200210002201), we get a palindrome (2222210122222).

The spelling of 1022000120021 in words is "one trillion, twenty-two billion, one hundred twenty thousand, twenty-one".