210000121111212 has 24 divisors (see below), whose sum is σ = 490000535640000. Its totient is φ = 70000004220816.

The previous prime is 210000121111181. The next prime is 210000121111243. The reversal of 210000121111212 is 212111121000012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (210000121111181) and next prime (210000121111243).

It is a junction number, because it is equal to n+sod(n) for n = 210000121111191 and 210000121111200.

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, 30610039 + ... + 36837137.

It is an arithmetic number, because the mean of its divisors is an integer number (20416688985000).

Almost surely, 2^{210000121111212} is an apocalyptic number.

It is an amenable number.

210000121111212 is an abundant number, since it is smaller than the sum of its proper divisors (280000414528788).

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

210000121111212 is a wasteful number, since it uses less digits than its factorization.

210000121111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9037405 (or 9037403 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210000121111212 its reverse (212111121000012), we get a palindrome (422111242111224).

The spelling of 210000121111212 in words is "two hundred ten trillion, one hundred twenty-one million, one hundred eleven thousand, two hundred twelve".