210010021989 has 4 divisors (see below), whose sum is σ = 280013362656. Its totient is φ = 140006681324.

The previous prime is 210010021979. The next prime is 210010021993. The reversal of 210010021989 is 989120010012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210010021989 - 2¹³ = 210010013797 is a prime.

It is a super-2 number, since 2×210010021989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210010021909) 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, 35001670329 + ... + 35001670334.

It is an arithmetic number, because the mean of its divisors is an integer number (70003340664).

Almost surely, 2^210010021989 is an apocalyptic number.

It is an amenable number.

210010021989 is a deficient number, since it is larger than the sum of its proper divisors (70003340667).

210010021989 is an equidigital number, since it uses as much as digits as its factorization.

210010021989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70003340666.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 210010021989 in words is "two hundred ten billion, ten million, twenty-one thousand, nine hundred eighty-nine".