212121010101150 has 96 divisors (see below), whose sum is σ = 584687350828800. Its totient is φ = 56548558533600.

The previous prime is 212121010101149. The next prime is 212121010101227. The reversal of 212121010101150 is 51101010121212.

It is a happy number.

It is a super-3 number, since 3×212121010101150³ (a number of 44 digits) contains 333 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19190136 + ... + 28151435.

It is an arithmetic number, because the mean of its divisors is an integer number (6090493237800).

Almost surely, 2^{212121010101150} is an apocalyptic number.

212121010101150 is an abundant number, since it is smaller than the sum of its proper divisors (372566340727650).

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

212121010101150 is a wasteful number, since it uses less digits than its factorization.

212121010101150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47344911 (or 47344900 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 18.

Adding to 212121010101150 its reverse (51101010121212), we get a palindrome (263222020222362).

The spelling of 212121010101150 in words is "two hundred twelve trillion, one hundred twenty-one billion, ten million, one hundred one thousand, one hundred fifty".