20012002061 has 2 divisors, whose sum is σ = 20012002062. Its totient is φ = 20012002060.

The previous prime is 20012002039. The next prime is 20012002069. The reversal of 20012002061 is 16020021002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19142106025 + 869896036 = 138355^2 + 29494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012002061 is a prime.

It is a super-3 number, since 3×20012002061³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012002069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006001030 + 10006001031.

It is an arithmetic number, because the mean of its divisors is an integer number (10006001031).

Almost surely, 2^20012002061 is an apocalyptic number.

It is an amenable number.

20012002061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012002061 is an equidigital number, since it uses as much as digits as its factorization.

20012002061 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 20012002061 its reverse (16020021002), we get a palindrome (36032023063).

The spelling of 20012002061 in words is "twenty billion, twelve million, two thousand, sixty-one".