210100022021 has 12 divisors (see below), whose sum is σ = 215792434656. Its totient is φ = 204553939680.

The previous prime is 210100022009. The next prime is 210100022023. The reversal of 210100022021 is 120220001012.

It is a happy number.

It is not a de Polignac number, because 210100022021 - 2²⁶ = 210032913157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210100021993 and 210100022011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210100022023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 690326 + ... + 946968.

It is an arithmetic number, because the mean of its divisors is an integer number (17982702888).

Almost surely, 2^210100022021 is an apocalyptic number.

It is an amenable number.

210100022021 is a deficient number, since it is larger than the sum of its proper divisors (5692412635).

210100022021 is an equidigital number, since it uses as much as digits as its factorization.

210100022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257212 (or 257171 counting only the distinct ones).

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

Adding to 210100022021 its reverse (120220001012), we get a palindrome (330320023033).

The spelling of 210100022021 in words is "two hundred ten billion, one hundred million, twenty-two thousand, twenty-one".