210121122120212 has 24 divisors (see below), whose sum is σ = 370522259701440. Its totient is φ = 104257633783680.

The previous prime is 210121122120211. The next prime is 210121122120229. The reversal of 210121122120212 is 212021221121012.

It is a super-2 number, since 2×210121122120212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121122120211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58391993 + ... + 61885919.

It is an arithmetic number, because the mean of its divisors is an integer number (15438427487560).

Almost surely, 2^{210121122120212} is an apocalyptic number.

It is an amenable number.

210121122120212 is a deficient number, since it is larger than the sum of its proper divisors (160401137581228).

210121122120212 is a wasteful number, since it uses less digits than its factorization.

210121122120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3608831 (or 3608829 counting only the distinct ones).

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

Adding to 210121122120212 its reverse (212021221121012), we get a palindrome (422142343241224).

The spelling of 210121122120212 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred twenty thousand, two hundred twelve".