10212222121111 has 4 divisors (see below), whose sum is σ = 10213462831824. Its totient is φ = 10210981410400.

The previous prime is 10212222121081. The next prime is 10212222121121. The reversal of 10212222121111 is 11112122221201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 10212222121111 - 2⁹ = 10212222120599 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 (10212222121121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620343010 + ... + 620359471.

It is an arithmetic number, because the mean of its divisors is an integer number (2553365707956).

Almost surely, 2^{10212222121111} is an apocalyptic number.

10212222121111 is a deficient number, since it is larger than the sum of its proper divisors (1240710713).

10212222121111 is an equidigital number, since it uses as much as digits as its factorization.

10212222121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240710712.

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

Adding to 10212222121111 its reverse (11112122221201), we get a palindrome (21324344342312).

The spelling of 10212222121111 in words is "ten trillion, two hundred twelve billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred eleven".