10122212111021 has 4 divisors (see below), whose sum is σ = 10260872550972. Its totient is φ = 9983551671072.

The previous prime is 10122212111003. The next prime is 10122212111027. The reversal of 10122212111021 is 12011121222101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7604550793225 + 2517661317796 = 2757635^2 + 1586714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10122212111021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10122212111027) 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 3 ways as a sum of consecutive naturals, for example, 69330219866 + ... + 69330220011.

It is an arithmetic number, because the mean of its divisors is an integer number (2565218137743).

Almost surely, 2^{10122212111021} is an apocalyptic number.

It is an amenable number.

10122212111021 is a deficient number, since it is larger than the sum of its proper divisors (138660439951).

10122212111021 is an equidigital number, since it uses as much as digits as its factorization.

10122212111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138660439950.

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

Adding to 10122212111021 its reverse (12011121222101), we get a palindrome (22133333333122).

The spelling of 10122212111021 in words is "ten trillion, one hundred twenty-two billion, two hundred twelve million, one hundred eleven thousand, twenty-one".