210121211010 has 64 divisors (see below), whose sum is σ = 508353905664. Its totient is φ = 55581240000.

The previous prime is 210121210997. The next prime is 210121211023. The reversal of 210121211010 is 10112121012.

It is an interprime number because it is at equal distance from previous prime (210121210997) and next prime (210121211023).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 10628635 + ... + 10648385.

It is an arithmetic number, because the mean of its divisors is an integer number (7943029776).

Almost surely, 2^210121211010 is an apocalyptic number.

210121211010 is an abundant number, since it is smaller than the sum of its proper divisors (298232694654).

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

210121211010 is a wasteful number, since it uses less digits than its factorization.

210121211010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22599.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210121211010 its reverse (10112121012), we get a palindrome (220233332022).

The spelling of 210121211010 in words is "two hundred ten billion, one hundred twenty-one million, two hundred eleven thousand, ten".