2029121 has 2 divisors, whose sum is σ = 2029122. Its totient is φ = 2029120.

The previous prime is 2029091. The next prime is 2029123. The reversal of 2029121 is 1219202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2002225 + 26896 = 1415^2 + 164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2029121 is a prime.

Together with 2029123, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2029121.

It is not a weakly prime, because it can be changed into another prime (2029123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014560 + 1014561.

It is an arithmetic number, because the mean of its divisors is an integer number (1014561).

2^2029121 is an apocalyptic number.

It is an amenable number.

2029121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2029121 is an equidigital number, since it uses as much as digits as its factorization.

2029121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 2029121 is about 1424.4721829506. The cubic root of 2029121 is about 126.6006635203.

The spelling of 2029121 in words is "two million, twenty-nine thousand, one hundred twenty-one".