20214021097 has 2 divisors, whose sum is σ = 20214021098. Its totient is φ = 20214021096.

The previous prime is 20214021073. The next prime is 20214021161. The reversal of 20214021097 is 79012041202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20157184576 + 56836521 = 141976^2 + 7539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20214021097 is a prime.

It is a super-2 number, since 2×20214021097² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20214021197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10107010548 + 10107010549.

It is an arithmetic number, because the mean of its divisors is an integer number (10107010549).

Almost surely, 2^20214021097 is an apocalyptic number.

It is an amenable number.

20214021097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20214021097 is an equidigital number, since it uses as much as digits as its factorization.

20214021097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 20214021097 its reverse (79012041202), we get a palindrome (99226062299).

The spelling of 20214021097 in words is "twenty billion, two hundred fourteen million, twenty-one thousand, ninety-seven".