21022012002011 has 4 divisors (see below), whose sum is σ = 21418653737952. Its totient is φ = 20625370266072.

The previous prime is 21022012002007. The next prime is 21022012002037. The reversal of 21022012002011 is 11020021022012.

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 21022012002011 - 2² = 21022012002007 is a prime.

It is a super-2 number, since 2×21022012002011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022012032011) 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, 198320867891 + ... + 198320867996.

It is an arithmetic number, because the mean of its divisors is an integer number (5354663434488).

Almost surely, 2^{21022012002011} is an apocalyptic number.

21022012002011 is a deficient number, since it is larger than the sum of its proper divisors (396641735941).

21022012002011 is an equidigital number, since it uses as much as digits as its factorization.

21022012002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396641735940.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21022012002011 its reverse (11020021022012), we get a palindrome (32042033024023).

The spelling of 21022012002011 in words is "twenty-one trillion, twenty-two billion, twelve million, two thousand, eleven".