2102221157 has 2 divisors, whose sum is σ = 2102221158. Its totient is φ = 2102221156.

The previous prime is 2102221129. The next prime is 2102221213. The reversal of 2102221157 is 7511222012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2072616676 + 29604481 = 45526^2 + 5441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102221157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102221117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051110578 + 1051110579.

It is an arithmetic number, because the mean of its divisors is an integer number (1051110579).

Almost surely, 2^2102221157 is an apocalyptic number.

It is an amenable number.

2102221157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102221157 is an equidigital number, since it uses as much as digits as its factorization.

2102221157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 2102221157 is about 45849.9853544142. The cubic root of 2102221157 is about 1281.0304927878.

Adding to 2102221157 its reverse (7511222012), we get a palindrome (9613443169).

The spelling of 2102221157 in words is "two billion, one hundred two million, two hundred twenty-one thousand, one hundred fifty-seven".