210000121210 has 32 divisors (see below), whose sum is σ = 426583324800. Its totient is φ = 73730448960.

The previous prime is 210000121193. The next prime is 210000121237. The reversal of 210000121210 is 12121000012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32912190 + ... + 32918569.

It is an arithmetic number, because the mean of its divisors is an integer number (13330728900).

Almost surely, 2^210000121210 is an apocalyptic number.

210000121210 is an abundant number, since it is smaller than the sum of its proper divisors (216583203590).

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

210000121210 is a wasteful number, since it uses less digits than its factorization.

210000121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65830806.

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

Adding to 210000121210 its reverse (12121000012), we get a palindrome (222121121222).

The spelling of 210000121210 in words is "two hundred ten billion, one hundred twenty-one thousand, two hundred ten".