212121101012 has 24 divisors (see below), whose sum is σ = 376280284800. Its totient is φ = 104615087616.

The previous prime is 212121100963. The next prime is 212121101029. The reversal of 212121101012 is 210101121212.

It is a super-3 number, since 3×212121101012³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7373 + ... + 651380.

It is an arithmetic number, because the mean of its divisors is an integer number (15678345200).

Almost surely, 2^212121101012 is an apocalyptic number.

It is an amenable number.

212121101012 is a deficient number, since it is larger than the sum of its proper divisors (164159183788).

212121101012 is a wasteful number, since it uses less digits than its factorization.

212121101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659855 (or 659853 counting only the distinct ones).

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

Adding to 212121101012 its reverse (210101121212), we get a palindrome (422222222224).

The spelling of 212121101012 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred one thousand, twelve".