210001121210 has 64 divisors (see below), whose sum is σ = 423509575680. Its totient is φ = 74505876480.

The previous prime is 210001121203. The next prime is 210001121249. The reversal of 210001121210 is 12121100012.

It is a super-2 number, since 2×210001121210² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210001121191 and 210001121200.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 446732 + ... + 787128.

It is an arithmetic number, because the mean of its divisors is an integer number (6617337120).

Almost surely, 2^210001121210 is an apocalyptic number.

210001121210 is an abundant number, since it is smaller than the sum of its proper divisors (213508454470).

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

210001121210 is a wasteful number, since it uses less digits than its factorization.

210001121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340631.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210001121210 its reverse (12121100012), we get a palindrome (222122221222).

The spelling of 210001121210 in words is "two hundred ten billion, one million, one hundred twenty-one thousand, two hundred ten".