21102202020011 has 4 divisors (see below), whose sum is σ = 24116802308592. Its totient is φ = 18087601731432.

The previous prime is 21102202020007. The next prime is 21102202020047. The reversal of 21102202020011 is 11002020220112.

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 21102202020011 - 2² = 21102202020007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21102202020071) 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, 1507300144280 + ... + 1507300144293.

It is an arithmetic number, because the mean of its divisors is an integer number (6029200577148).

Almost surely, 2^{21102202020011} is an apocalyptic number.

21102202020011 is a deficient number, since it is larger than the sum of its proper divisors (3014600288581).

21102202020011 is an equidigital number, since it uses as much as digits as its factorization.

21102202020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014600288580.

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

Adding to 21102202020011 its reverse (11002020220112), we get a palindrome (32104222240123).

The spelling of 21102202020011 in words is "twenty-one trillion, one hundred two billion, two hundred two million, twenty thousand, eleven".