10211212121102 has 4 divisors (see below), whose sum is σ = 15316818181656. Its totient is φ = 5105606060550.

The previous prime is 10211212121083. The next prime is 10211212121107. The reversal of 10211212121102 is 20112121211201.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211212121107) 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 as a sum of consecutive naturals, namely, 2552803030274 + ... + 2552803030277.

It is an arithmetic number, because the mean of its divisors is an integer number (3829204545414).

Almost surely, 2^{10211212121102} is an apocalyptic number.

10211212121102 is a deficient number, since it is larger than the sum of its proper divisors (5105606060554).

10211212121102 is an equidigital number, since it uses as much as digits as its factorization.

10211212121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5105606060553.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 10211212121102 its reverse (20112121211201), we get a palindrome (30323333332303).

Subtracting 10211212121102 from its reverse (20112121211201), we obtain a palindrome (9900909090099).

The spelling of 10211212121102 in words is "ten trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred two".