1021722207106 has 16 divisors (see below), whose sum is σ = 1537068367800. Its totient is φ = 509366263680.

The previous prime is 1021722207067. The next prime is 1021722207109. The reversal of 1021722207106 is 6017022271201.

It can be written as a sum of positive squares in 4 ways, for example, as 862221816481 + 159500390625 = 928559^2 + 399375^2 .

It is not an unprimeable number, because it can be changed into a prime (1021722207109) 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, 15085590 + ... + 15153166.

Almost surely, 2^{1021722207106} is an apocalyptic number.

1021722207106 is a deficient number, since it is larger than the sum of its proper divisors (515346160694).

1021722207106 is a wasteful number, since it uses less digits than its factorization.

1021722207106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89589.

The product of its (nonzero) digits is 4704, while the sum is 31.

Adding to 1021722207106 its reverse (6017022271201), we get a palindrome (7038744478307).

The spelling of 1021722207106 in words is "one trillion, twenty-one billion, seven hundred twenty-two million, two hundred seven thousand, one hundred six".