11111022210021 has 16 divisors (see below), whose sum is σ = 15294135525888. Its totient is φ = 7167676824000.

The previous prime is 11111022210019. The next prime is 11111022210097. The reversal of 11111022210021 is 12001222011111.

It is a happy number.

11111022210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11111022210021 - 2¹ = 11111022210019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111022200021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5112606 + ... + 6954191.

It is an arithmetic number, because the mean of its divisors is an integer number (955883470368).

Almost surely, 2^{11111022210021} is an apocalyptic number.

It is an amenable number.

11111022210021 is a deficient number, since it is larger than the sum of its proper divisors (4183113315867).

11111022210021 is a wasteful number, since it uses less digits than its factorization.

11111022210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12076732.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11111022210021 its reverse (12001222011111), we get a palindrome (23112244221132).

The spelling of 11111022210021 in words is "eleven trillion, one hundred eleven billion, twenty-two million, two hundred ten thousand, twenty-one".