2120211157 has 2 divisors, whose sum is σ = 2120211158. Its totient is φ = 2120211156.

The previous prime is 2120211109. The next prime is 2120211161. The reversal of 2120211157 is 7511120212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1771231396 + 348979761 = 42086^2 + 18681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120211157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120215157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060105578 + 1060105579.

It is an arithmetic number, because the mean of its divisors is an integer number (1060105579).

Almost surely, 2^2120211157 is an apocalyptic number.

It is an amenable number.

2120211157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120211157 is an equidigital number, since it uses as much as digits as its factorization.

2120211157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 2120211157 is about 46045.7506942823. The cubic root of 2120211157 is about 1284.6743070775.

Adding to 2120211157 its reverse (7511120212), we get a palindrome (9631331369).

The spelling of 2120211157 in words is "two billion, one hundred twenty million, two hundred eleven thousand, one hundred fifty-seven".