10111222100021 has 12 divisors (see below), whose sum is σ = 11883291958188. Its totient is φ = 8577413736192.

The previous prime is 10111222099999. The next prime is 10111222100107. The reversal of 10111222100021 is 12000122211101.

It can be written as a sum of positive squares in 2 ways, for example, as 3512288292100 + 6598933807921 = 1874110^2 + 2568839^2 .

It is not a de Polignac number, because 10111222100021 - 2¹⁰ = 10111222098997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10111222099969 and 10111222100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111222106021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1063662626 + ... + 1063672131.

It is an arithmetic number, because the mean of its divisors is an integer number (990274329849).

Almost surely, 2^{10111222100021} is an apocalyptic number.

It is an amenable number.

10111222100021 is a deficient number, since it is larger than the sum of its proper divisors (1772069858167).

10111222100021 is an equidigital number, since it uses as much as digits as its factorization.

10111222100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127334868 (or 2127334861 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10111222100021 its reverse (12000122211101), we get a palindrome (22111344311122).

The spelling of 10111222100021 in words is "ten trillion, one hundred eleven billion, two hundred twenty-two million, one hundred thousand, twenty-one".