22010021221021 has 2 divisors, whose sum is σ = 22010021221022. Its totient is φ = 22010021221020.

The previous prime is 22010021220991. The next prime is 22010021221079. The reversal of 22010021221021 is 12012212001022.

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., 12917655444996 + 9092365776025 = 3594114^2 + 3015355^2 .

It is a cyclic number.

It is not a de Polignac number, because 22010021221021 - 2²³ = 22010012832413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22010021220986 and 22010021221004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22010021228021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005010610510 + 11005010610511.

It is an arithmetic number, because the mean of its divisors is an integer number (11005010610511).

Almost surely, 2^{22010021221021} is an apocalyptic number.

It is an amenable number.

22010021221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22010021221021 is an equidigital number, since it uses as much as digits as its factorization.

22010021221021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22010021221021 its reverse (12012212001022), we get a palindrome (34022233222043).

The spelling of 22010021221021 in words is "twenty-two trillion, ten billion, twenty-one million, two hundred twenty-one thousand, twenty-one".