212101222121012 has 24 divisors (see below), whose sum is σ = 424304440734720. Its totient is φ = 90878667374880.

The previous prime is 212101222121003. The next prime is 212101222121023. The reversal of 212101222121012 is 210121222101212.

It is a super-3 number, since 3×212101222121012³ (a number of 44 digits) contains 333 as substring.

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, 910564439 + ... + 910797342.

It is an arithmetic number, because the mean of its divisors is an integer number (17679351697280).

Almost surely, 2^{212101222121012} is an apocalyptic number.

It is an amenable number.

212101222121012 is an abundant number, since it is smaller than the sum of its proper divisors (212203218613708).

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

212101222121012 is a wasteful number, since it uses less digits than its factorization.

212101222121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821365951 (or 1821365949 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212101222121012 its reverse (210121222101212), we get a palindrome (422222444222224).

The spelling of 212101222121012 in words is "two hundred twelve trillion, one hundred one billion, two hundred twenty-two million, one hundred twenty-one thousand, twelve".