11011001421 has 16 divisors (see below), whose sum is σ = 17232147584. Its totient is φ = 6121946304.

The previous prime is 11011001399. The next prime is 11011001423. The reversal of 11011001421 is 12410011011.

It is not a de Polignac number, because 11011001421 - 2⁹ = 11011000909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011001397 and 11011001406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011001423) 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, 7084810 + ... + 7086363.

It is an arithmetic number, because the mean of its divisors is an integer number (1077009224).

Almost surely, 2^11011001421 is an apocalyptic number.

It is an amenable number.

11011001421 is a deficient number, since it is larger than the sum of its proper divisors (6221146163).

11011001421 is a wasteful number, since it uses less digits than its factorization.

11011001421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14171220.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11011001421 its reverse (12410011011), we get a palindrome (23421012432).

The spelling of 11011001421 in words is "eleven billion, eleven million, one thousand, four hundred twenty-one".