212122112121101 has 24 divisors (see below), whose sum is σ = 265736481371424. Its totient is φ = 167832192659040.

The previous prime is 212122112121041. The next prime is 212122112121113. The reversal of 212122112121101 is 101121211221212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-212122112121101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122112121901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202478606 + ... + 203523536.

It is an arithmetic number, because the mean of its divisors is an integer number (11072353390476).

Almost surely, 2^{212122112121101} is an apocalyptic number.

It is an amenable number.

212122112121101 is a deficient number, since it is larger than the sum of its proper divisors (53614369250323).

212122112121101 is a wasteful number, since it uses less digits than its factorization.

212122112121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363641 (or 1363634 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 212122112121101 its reverse (101121211221212), we get a palindrome (313243323342313).

The spelling of 212122112121101 in words is "two hundred twelve trillion, one hundred twenty-two billion, one hundred twelve million, one hundred twenty-one thousand, one hundred one".