20021102099969 has 2 divisors, whose sum is σ = 20021102099970. Its totient is φ = 20021102099968.

The previous prime is 20021102099959. The next prime is 20021102100049. The reversal of 20021102099969 is 96999020112002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19951078355569 + 70023744400 = 4466663^2 + 264620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20021102099969 is a prime.

It is a super-2 number, since 2×20021102099969² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20021102099939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010551049984 + 10010551049985.

It is an arithmetic number, because the mean of its divisors is an integer number (10010551049985).

Almost surely, 2^{20021102099969} is an apocalyptic number.

It is an amenable number.

20021102099969 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021102099969 is an equidigital number, since it uses as much as digits as its factorization.

20021102099969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 50.

The spelling of 20021102099969 in words is "twenty trillion, twenty-one billion, one hundred two million, ninety-nine thousand, nine hundred sixty-nine".