210121110010 has 128 divisors (see below), whose sum is σ = 464628026880. Its totient is φ = 66819354624.

The previous prime is 210121109971. The next prime is 210121110011. The reversal of 210121110010 is 10011121012.

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 (210121110011) 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, 13293432 + ... + 13309228.

It is an arithmetic number, because the mean of its divisors is an integer number (3629906460).

Almost surely, 2^210121110010 is an apocalyptic number.

210121110010 is an abundant number, since it is smaller than the sum of its proper divisors (254506916870).

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

210121110010 is a wasteful number, since it uses less digits than its factorization.

210121110010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16040.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 210121110010 its reverse (10011121012), we get a palindrome (220132231022).

The spelling of 210121110010 in words is "two hundred ten billion, one hundred twenty-one million, one hundred ten thousand, ten".