100212021061 has 2 divisors, whose sum is σ = 100212021062. Its totient is φ = 100212021060.

The previous prime is 100212021059. The next prime is 100212021127. The reversal of 100212021061 is 160120212001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98153130436 + 2058890625 = 313294^2 + 45375^2 .

It is a cyclic number.

It is not a de Polignac number, because 100212021061 - 2¹ = 100212021059 is a prime.

Together with 100212021059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100212027061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50106010530 + 50106010531.

It is an arithmetic number, because the mean of its divisors is an integer number (50106010531).

Almost surely, 2^100212021061 is an apocalyptic number.

It is an amenable number.

100212021061 is a deficient number, since it is larger than the sum of its proper divisors (1).

100212021061 is an equidigital number, since it uses as much as digits as its factorization.

100212021061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 100212021061 its reverse (160120212001), we get a palindrome (260332233062).

The spelling of 100212021061 in words is "one hundred billion, two hundred twelve million, twenty-one thousand, sixty-one".