200020100020061 has 2 divisors, whose sum is σ = 200020100020062. Its totient is φ = 200020100020060.

The previous prime is 200020100020049. The next prime is 200020100020123. The reversal of 200020100020061 is 160020001020002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191224812500836 + 8795287519225 = 13828406^2 + 2965685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200020100020061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200020100020561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010050010030 + 100010050010031.

It is an arithmetic number, because the mean of its divisors is an integer number (100010050010031).

Almost surely, 2^{200020100020061} is an apocalyptic number.

It is an amenable number.

200020100020061 is a deficient number, since it is larger than the sum of its proper divisors (1).

200020100020061 is an equidigital number, since it uses as much as digits as its factorization.

200020100020061 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 14.

Adding to 200020100020061 its reverse (160020001020002), we get a palindrome (360040101040063).

The spelling of 200020100020061 in words is "two hundred trillion, twenty billion, one hundred million, twenty thousand, sixty-one".