210000012121111 has 8 divisors (see below), whose sum is σ = 212052652501664. Its totient is φ = 207947637227520.

The previous prime is 210000012121093. The next prime is 210000012121127. The reversal of 210000012121111 is 111121210000012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 210000012121111 - 2¹⁵ = 210000012088343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210000012121091 and 210000012121100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210000012121171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64781826 + ... + 67946191.

It is an arithmetic number, because the mean of its divisors is an integer number (26506581562708).

Almost surely, 2^{210000012121111} is an apocalyptic number.

210000012121111 is a deficient number, since it is larger than the sum of its proper divisors (2052640380553).

210000012121111 is a wasteful number, since it uses less digits than its factorization.

210000012121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132743481.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 210000012121111 its reverse (111121210000012), we get a palindrome (321121222121123).

The spelling of 210000012121111 in words is "two hundred ten trillion, twelve million, one hundred twenty-one thousand, one hundred eleven".