2130503021 has 2 divisors, whose sum is σ = 2130503022. Its totient is φ = 2130503020.

The previous prime is 2130502973. The next prime is 2130503027. The reversal of 2130503021 is 1203050312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1253514025 + 876988996 = 35405^2 + 29614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130503021 - 2¹⁸ = 2130240877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2130503027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065251510 + 1065251511.

It is an arithmetic number, because the mean of its divisors is an integer number (1065251511).

Almost surely, 2^2130503021 is an apocalyptic number.

It is an amenable number.

2130503021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130503021 is an equidigital number, since it uses as much as digits as its factorization.

2130503021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 2130503021 is about 46157.3723363885. The cubic root of 2130503021 is about 1286.7496282501.

Adding to 2130503021 its reverse (1203050312), we get a palindrome (3333553333).

The spelling of 2130503021 in words is "two billion, one hundred thirty million, five hundred three thousand, twenty-one".