21022101112011 has 4 divisors (see below), whose sum is σ = 28029468149352. Its totient is φ = 14014734074672.

The previous prime is 21022101111989. The next prime is 21022101112043. The reversal of 21022101112011 is 11021110122012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21022101112011 - 2¹³ = 21022101103819 is a prime.

It is a super-2 number, since 2×21022101112011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21022101112081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3503683518666 + ... + 3503683518671.

It is an arithmetic number, because the mean of its divisors is an integer number (7007367037338).

Almost surely, 2^{21022101112011} is an apocalyptic number.

21022101112011 is a deficient number, since it is larger than the sum of its proper divisors (7007367037341).

21022101112011 is an equidigital number, since it uses as much as digits as its factorization.

21022101112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007367037340.

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

Adding to 21022101112011 its reverse (11021110122012), we get a palindrome (32043211234023).

The spelling of 21022101112011 in words is "twenty-one trillion, twenty-two billion, one hundred one million, one hundred twelve thousand, eleven".