10212120212121 has 8 divisors (see below), whose sum is σ = 15129066980960. Its totient is φ = 6808080141396.

The previous prime is 10212120212081. The next prime is 10212120212123. The reversal of 10212120212121 is 12121202121201.

10212120212121 is a `hidden beast` number, since 1 + 0 + 212 + 120 + 212 + 121 = 666.

It is not a de Polignac number, because 10212120212121 - 2²⁹ = 10211583341209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10212120212094 and 10212120212103.

It is not an unprimeable number, because it can be changed into a prime (10212120212123) 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, 189113337235 + ... + 189113337288.

It is an arithmetic number, because the mean of its divisors is an integer number (1891133372620).

Almost surely, 2^{10212120212121} is an apocalyptic number.

It is an amenable number.

10212120212121 is a deficient number, since it is larger than the sum of its proper divisors (4916946768839).

10212120212121 is an equidigital number, since it uses as much as digits as its factorization.

10212120212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378226674532 (or 378226674526 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 10212120212121 its reverse (12121202121201), we get a palindrome (22333322333322).

The spelling of 10212120212121 in words is "ten trillion, two hundred twelve billion, one hundred twenty million, two hundred twelve thousand, one hundred twenty-one".