210021102011 has 6 divisors (see below), whose sum is σ = 244310261580. Its totient is φ = 180018087396.

The previous prime is 210021101977. The next prime is 210021102079. The reversal of 210021102011 is 110201120012.

It is not a de Polignac number, because 210021102011 - 2⁶ = 210021101947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210021101983 and 210021102001.

It is not an unprimeable number, because it can be changed into a prime (210021102911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2143072421 + ... + 2143072518.

It is an arithmetic number, because the mean of its divisors is an integer number (40718376930).

Almost surely, 2^210021102011 is an apocalyptic number.

210021102011 is a deficient number, since it is larger than the sum of its proper divisors (34289159569).

210021102011 is an equidigital number, since it uses as much as digits as its factorization.

210021102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4286144953 (or 4286144946 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210021102011 its reverse (110201120012), we get a palindrome (320222222023).

The spelling of 210021102011 in words is "two hundred ten billion, twenty-one million, one hundred two thousand, eleven".