212121022 has 8 divisors (see below), whose sum is σ = 329153400. Its totient is φ = 102403224.

The previous prime is 212120983. The next prime is 212121023. The reversal of 212121022 is 220121212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×212121022³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212120993 and 212121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121023) 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, 1828572 + ... + 1828687.

It is an arithmetic number, because the mean of its divisors is an integer number (41144175).

Almost surely, 2^212121022 is an apocalyptic number.

212121022 is a deficient number, since it is larger than the sum of its proper divisors (117032378).

212121022 is a wasteful number, since it uses less digits than its factorization.

212121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3657290.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 212121022 is about 14564.3750981633. The cubic root of 212121022 is about 596.3866367297.

Adding to 212121022 its reverse (220121212), we get a palindrome (432242234).

The spelling of 212121022 in words is "two hundred twelve million, one hundred twenty-one thousand, twenty-two".