2142302021 has 2 divisors, whose sum is σ = 2142302022. Its totient is φ = 2142302020.

The previous prime is 2142301981. The next prime is 2142302051. The reversal of 2142302021 is 1202032412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2101213921 + 41088100 = 45839^2 + 6410^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142302021 - 2¹⁴ = 2142285637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142302051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071151010 + 1071151011.

It is an arithmetic number, because the mean of its divisors is an integer number (1071151011).

Almost surely, 2^2142302021 is an apocalyptic number.

It is an amenable number.

2142302021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142302021 is an equidigital number, since it uses as much as digits as its factorization.

2142302021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2142302021 is about 46285.0085988973. The cubic root of 2142302021 is about 1289.1206516413.

Adding to 2142302021 its reverse (1202032412), we get a palindrome (3344334433).

The spelling of 2142302021 in words is "two billion, one hundred forty-two million, three hundred two thousand, twenty-one".