10211212122121 has 8 divisors (see below), whose sum is σ = 10254295003680. Its totient is φ = 10168218348288.

The previous prime is 10211212122109. The next prime is 10211212122161. The reversal of 10211212122121 is 12122121211201.

It is a happy number.

10211212122121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10211212122121 - 2¹⁹ = 10211211597833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10211212122161) 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, 22047256 + ... + 22505641.

It is an arithmetic number, because the mean of its divisors is an integer number (1281786875460).

Almost surely, 2^{10211212122121} is an apocalyptic number.

It is an amenable number.

10211212122121 is a deficient number, since it is larger than the sum of its proper divisors (43082881559).

10211212122121 is an equidigital number, since it uses as much as digits as its factorization.

10211212122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44553863.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 10211212122121 its reverse (12122121211201), we get a palindrome (22333333333322).

The spelling of 10211212122121 in words is "ten trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty-two thousand, one hundred twenty-one".