210021022011 has 4 divisors (see below), whose sum is σ = 280028029352. Its totient is φ = 140014014672.

The previous prime is 210021022007. The next prime is 210021022027. The reversal of 210021022011 is 110220120012.

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

It is not a de Polignac number, because 210021022011 - 2² = 210021022007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210021023011) 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, 35003503666 + ... + 35003503671.

It is an arithmetic number, because the mean of its divisors is an integer number (70007007338).

Almost surely, 2^210021022011 is an apocalyptic number.

210021022011 is a deficient number, since it is larger than the sum of its proper divisors (70007007341).

210021022011 is an equidigital number, since it uses as much as digits as its factorization.

210021022011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70007007340.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210021022011 its reverse (110220120012), we get a palindrome (320241142023).

The spelling of 210021022011 in words is "two hundred ten billion, twenty-one million, twenty-two thousand, eleven".