11121010012021 has 32 divisors (see below), whose sum is σ = 13924396281600. Its totient is φ = 8646791523840.

The previous prime is 11121010012003. The next prime is 11121010012033. The reversal of 11121010012021 is 12021001012111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11121010012021 - 2²¹ = 11121007914869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 11121010011992 and 11121010012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121010012081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14602801 + ... + 15345481.

It is an arithmetic number, because the mean of its divisors is an integer number (435137383800).

Almost surely, 2^{11121010012021} is an apocalyptic number.

It is an amenable number.

11121010012021 is a deficient number, since it is larger than the sum of its proper divisors (2803386269579).

11121010012021 is a wasteful number, since it uses less digits than its factorization.

11121010012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745549.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11121010012021 its reverse (12021001012111), we get a palindrome (23142011024132).

The spelling of 11121010012021 in words is "eleven trillion, one hundred twenty-one billion, ten million, twelve thousand, twenty-one".