2120121701 has 2 divisors, whose sum is σ = 2120121702. Its totient is φ = 2120121700.

The previous prime is 2120121667. The next prime is 2120121737. The reversal of 2120121701 is 1071210212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1655676100 + 464445601 = 40690^2 + 21551^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120121701 - 2²² = 2115927397 is a prime.

It is a super-2 number, since 2×2120121701² = 8989832054102266802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2120121701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120123701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060060850 + 1060060851.

It is an arithmetic number, because the mean of its divisors is an integer number (1060060851).

Almost surely, 2^2120121701 is an apocalyptic number.

It is an amenable number.

2120121701 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120121701 is an equidigital number, since it uses as much as digits as its factorization.

2120121701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 2120121701 is about 46044.7793023270. The cubic root of 2120121701 is about 1284.6562391536.

Adding to 2120121701 its reverse (1071210212), we get a palindrome (3191331913).

The spelling of 2120121701 in words is "two billion, one hundred twenty million, one hundred twenty-one thousand, seven hundred one".