212021007097 has 2 divisors, whose sum is σ = 212021007098. Its totient is φ = 212021007096.

The previous prime is 212021007089. The next prime is 212021007127. The reversal of 212021007097 is 790700120212.

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., 212019727936 + 1279161 = 460456^2 + 1131^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021007097 - 2³ = 212021007089 is a prime.

It is a super-2 number, since 2×212021007097² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212021007047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010503548 + 106010503549.

It is an arithmetic number, because the mean of its divisors is an integer number (106010503549).

Almost surely, 2^212021007097 is an apocalyptic number.

It is an amenable number.

212021007097 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021007097 is an equidigital number, since it uses as much as digits as its factorization.

212021007097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 31.

The spelling of 212021007097 in words is "two hundred twelve billion, twenty-one million, seven thousand, ninety-seven".