11211101010021 has 16 divisors (see below), whose sum is σ = 16654014655488. Its totient is φ = 6650040572400.

The previous prime is 11211101010019. The next prime is 11211101010041. The reversal of 11211101010021 is 12001010111211.

It is not a de Polignac number, because 11211101010021 - 2¹ = 11211101010019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11211101009979 and 11211101010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211101010041) 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, 3614150935 + ... + 3614154036.

It is an arithmetic number, because the mean of its divisors is an integer number (1040875915968).

Almost surely, 2^{11211101010021} is an apocalyptic number.

11211101010021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11211101010021 is a deficient number, since it is larger than the sum of its proper divisors (5442913645467).

11211101010021 is a wasteful number, since it uses less digits than its factorization.

11211101010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7228305032.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11211101010021 its reverse (12001010111211), we get a palindrome (23212111121232).

The spelling of 11211101010021 in words is "eleven trillion, two hundred eleven billion, one hundred one million, ten thousand, twenty-one".