2102262661 has 2 divisors, whose sum is σ = 2102262662. Its totient is φ = 2102262660.

The previous prime is 2102262641. The next prime is 2102262697. The reversal of 2102262661 is 1662622012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1422044100 + 680218561 = 37710^2 + 26081^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102262661 - 2²³ = 2093874053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102262641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051131330 + 1051131331.

It is an arithmetic number, because the mean of its divisors is an integer number (1051131331).

Almost surely, 2^2102262661 is an apocalyptic number.

It is an amenable number.

2102262661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102262661 is an equidigital number, since it uses as much as digits as its factorization.

2102262661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 2102262661 is about 45850.4379586499. The cubic root of 2102262661 is about 1281.0389231631.

Adding to 2102262661 its reverse (1662622012), we get a palindrome (3764884673).

The spelling of 2102262661 in words is "two billion, one hundred two million, two hundred sixty-two thousand, six hundred sixty-one".