210221121110010 has 128 divisors (see below), whose sum is σ = 506772816076800. Its totient is φ = 55810329696000.

The previous prime is 210221121109991. The next prime is 210221121110017. The reversal of 210221121110010 is 10011121122012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (210221121110017) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42460333035 + ... + 42460337985.

It is an arithmetic number, because the mean of its divisors is an integer number (3959162625600).

Almost surely, 2^{210221121110010} is an apocalyptic number.

210221121110010 is an abundant number, since it is smaller than the sum of its proper divisors (296551694966790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210221121110010 is a wasteful number, since it uses less digits than its factorization.

210221121110010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9924.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210221121110010 its reverse (10011121122012), we get a palindrome (220232242232022).

It can be divided in two parts, 2102 and 21121110010, that added together give a palindrome (21121112112).

The spelling of 210221121110010 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred ten thousand, ten".