210122021020021 has 16 divisors (see below), whose sum is σ = 232648164034560. Its totient is φ = 188166638951280.

The previous prime is 210122021019983. The next prime is 210122021020049. The reversal of 210122021020021 is 120020120221012.

It is a happy number.

It is not a de Polignac number, because 210122021020021 - 2⁷ = 210122021019893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210122021019977 and 210122021020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210122021020621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59079900 + ... + 62535418.

It is an arithmetic number, because the mean of its divisors is an integer number (14540510252160).

Almost surely, 2^{210122021020021} is an apocalyptic number.

It is an amenable number.

210122021020021 is a deficient number, since it is larger than the sum of its proper divisors (22526143014539).

210122021020021 is a wasteful number, since it uses less digits than its factorization.

210122021020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538104.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210122021020021 its reverse (120020120221012), we get a palindrome (330142141241033).

The spelling of 210122021020021 in words is "two hundred ten trillion, one hundred twenty-two billion, twenty-one million, twenty thousand, twenty-one".