2102220061 has 2 divisors, whose sum is σ = 2102220062. Its totient is φ = 2102220060.

The previous prime is 2102220047. The next prime is 2102220149. The reversal of 2102220061 is 1600222012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1737639225 + 364580836 = 41685^2 + 19094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102220061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102220031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051110030 + 1051110031.

It is an arithmetic number, because the mean of its divisors is an integer number (1051110031).

Almost surely, 2^2102220061 is an apocalyptic number.

It is an amenable number.

2102220061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102220061 is an equidigital number, since it uses as much as digits as its factorization.

2102220061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2102220061 is about 45849.9734023914. The cubic root of 2102220061 is about 1281.0302701646.

Adding to 2102220061 its reverse (1600222012), we get a palindrome (3702442073).

The spelling of 2102220061 in words is "two billion, one hundred two million, two hundred twenty thousand, sixty-one".