201022121212 has 12 divisors (see below), whose sum is σ = 383769504216. Its totient is φ = 91373691440.

The previous prime is 201022121123. The next prime is 201022121213. The reversal of 201022121212 is 212121220102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201022121213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2284342243 + ... + 2284342330.

It is an arithmetic number, because the mean of its divisors is an integer number (31980792018).

Almost surely, 2^201022121212 is an apocalyptic number.

201022121212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

201022121212 is a deficient number, since it is larger than the sum of its proper divisors (182747383004).

201022121212 is a wasteful number, since it uses less digits than its factorization.

201022121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4568684588 (or 4568684586 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201022121212 its reverse (212121220102), we get a palindrome (413143341314).

The spelling of 201022121212 in words is "two hundred one billion, twenty-two million, one hundred twenty-one thousand, two hundred twelve".