210021100022 has 4 divisors (see below), whose sum is σ = 315031650036. Its totient is φ = 105010550010.

The previous prime is 210021100019. The next prime is 210021100027. The reversal of 210021100022 is 220001120012.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 210021099976 and 210021100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021100027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52505275004 + ... + 52505275007.

It is an arithmetic number, because the mean of its divisors is an integer number (78757912509).

Almost surely, 2^210021100022 is an apocalyptic number.

210021100022 is a deficient number, since it is larger than the sum of its proper divisors (105010550014).

210021100022 is a wasteful number, since it uses less digits than its factorization.

210021100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105010550013.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210021100022 its reverse (220001120012), we get a palindrome (430022220034).

The spelling of 210021100022 in words is "two hundred ten billion, twenty-one million, one hundred thousand, twenty-two".