211212121202010 has 64 divisors (see below), whose sum is σ = 563249231193600. Its totient is φ = 56321541521856.

The previous prime is 211212121201987. The next prime is 211212121202021. The reversal of 211212121202010 is 10202121212112.

211212121202010 is a `hidden beast` number, since 211 + 21 + 21 + 212 + 0 + 201 + 0 = 666.

It is a super-2 number, since 2×211212121202010² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 31 ways as a sum of consecutive naturals, for example, 2718049 + ... + 20731908.

It is an arithmetic number, because the mean of its divisors is an integer number (8800769237400).

Almost surely, 2^{211212121202010} is an apocalyptic number.

211212121202010 is an abundant number, since it is smaller than the sum of its proper divisors (352037109991590).

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

211212121202010 is a wasteful number, since it uses less digits than its factorization.

211212121202010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23483332 (or 23483326 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211212121202010 its reverse (10202121212112), we get a palindrome (221414242414122).

The spelling of 211212121202010 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred twenty-one million, two hundred two thousand, ten".