2052121997 has 2 divisors, whose sum is σ = 2052121998. Its totient is φ = 2052121996.

The previous prime is 2052121987. The next prime is 2052122069. The reversal of 2052121997 is 7991212502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2047653001 + 4468996 = 45251^2 + 2114^2 .

It is a cyclic number.

It is not a de Polignac number, because 2052121997 - 2²⁶ = 1985013133 is a prime.

It is a super-2 number, since 2×2052121997² = 8422409381142536018, 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 2052121997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2052121937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026060998 + 1026060999.

It is an arithmetic number, because the mean of its divisors is an integer number (1026060999).

Almost surely, 2^2052121997 is an apocalyptic number.

It is an amenable number.

2052121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2052121997 is an equidigital number, since it uses as much as digits as its factorization.

2052121997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 2052121997 is about 45300.3531663937. The cubic root of 2052121997 is about 1270.7722579046.

The spelling of 2052121997 in words is "two billion, fifty-two million, one hundred twenty-one thousand, nine hundred ninety-seven".