20110021210 has 16 divisors (see below), whose sum is σ = 36203130216. Its totient is φ = 8042876928.

The previous prime is 20110021207. The next prime is 20110021213. The reversal of 20110021210 is 1212001102.

It is an interprime number because it is at equal distance from previous prime (20110021207) and next prime (20110021213).

It can be written as a sum of positive squares in 4 ways, for example, as 12042209169 + 8067812041 = 109737^2 + 89821^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (20110021213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64827 + ... + 210766.

Almost surely, 2^20110021210 is an apocalyptic number.

20110021210 is a deficient number, since it is larger than the sum of its proper divisors (16093109006).

20110021210 is a wasteful number, since it uses less digits than its factorization.

20110021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282897.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20110021210 its reverse (1212001102), we get a palindrome (21322022312).

The spelling of 20110021210 in words is "twenty billion, one hundred ten million, twenty-one thousand, two hundred ten".