210121220011010 has 384 divisors, whose sum is σ = 506844047001600. Its totient is φ = 62165857353600.

The previous prime is 210121220010997. The next prime is 210121220011111. The reversal of 210121220011010 is 10110022121012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2614611089 + ... + 2614691451.

It is an arithmetic number, because the mean of its divisors is an integer number (1319906372400).

Almost surely, 2^{210121220011010} is an apocalyptic number.

210121220011010 is an abundant number, since it is smaller than the sum of its proper divisors (296722826990590).

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

210121220011010 is a wasteful number, since it uses less digits than its factorization.

210121220011010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80579 (or 80542 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210121220011010 its reverse (10110022121012), we get a palindrome (220231242132022).

The spelling of 210121220011010 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred twenty million, eleven thousand, ten".