1022120200021 has 2 divisors, whose sum is σ = 1022120200022. Its totient is φ = 1022120200020.

The previous prime is 1022120200009. The next prime is 1022120200037. The reversal of 1022120200021 is 1200020212201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 993909302500 + 28210897521 = 996950^2 + 167961^2 .

It is an emirp because it is prime and its reverse (1200020212201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1022120200021 - 2¹⁵ = 1022120167253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1022120199974 and 1022120200010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022120200051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511060100010 + 511060100011.

It is an arithmetic number, because the mean of its divisors is an integer number (511060100011).

Almost surely, 2^{1022120200021} is an apocalyptic number.

It is an amenable number.

1022120200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022120200021 is an equidigital number, since it uses as much as digits as its factorization.

1022120200021 is an evil number, because the sum of its binary digits is even.

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

Adding to 1022120200021 its reverse (1200020212201), we get a palindrome (2222140412222).

The spelling of 1022120200021 in words is "one trillion, twenty-two billion, one hundred twenty million, two hundred thousand, twenty-one".