2130021031 has 4 divisors (see below), whose sum is σ = 2131012512. Its totient is φ = 2129029552.

The previous prime is 2130020987. The next prime is 2130021037. The reversal of 2130021031 is 1301200312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2130021031 - 2²¹ = 2127923879 is a prime.

It is a super-2 number, since 2×2130021031² = 9073979185004605922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130021037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492511 + ... + 496816.

It is an arithmetic number, because the mean of its divisors is an integer number (532753128).

Almost surely, 2^2130021031 is an apocalyptic number.

2130021031 is a deficient number, since it is larger than the sum of its proper divisors (991481).

2130021031 is an equidigital number, since it uses as much as digits as its factorization.

2130021031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991480.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2130021031 is about 46152.1508816220. The cubic root of 2130021031 is about 1286.6525858736.

Adding to 2130021031 its reverse (1301200312), we get a palindrome (3431221343).

The spelling of 2130021031 in words is "two billion, one hundred thirty million, twenty-one thousand, thirty-one".