2142021001 has 2 divisors, whose sum is σ = 2142021002. Its totient is φ = 2142021000.

The previous prime is 2142020999. The next prime is 2142021059. The reversal of 2142021001 is 1001202412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1671174400 + 470846601 = 40880^2 + 21699^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142021001 - 2¹ = 2142020999 is a prime.

Together with 2142020999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2142021061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071010500 + 1071010501.

It is an arithmetic number, because the mean of its divisors is an integer number (1071010501).

Almost surely, 2^2142021001 is an apocalyptic number.

It is an amenable number.

2142021001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142021001 is an equidigital number, since it uses as much as digits as its factorization.

2142021001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2142021001 is about 46281.9727431751. The cubic root of 2142021001 is about 1289.0642816674.

Adding to 2142021001 its reverse (1001202412), we get a palindrome (3143223413).

The spelling of 2142021001 in words is "two billion, one hundred forty-two million, twenty-one thousand, one".