210021212222101 has 4 divisors (see below), whose sum is σ = 240024242539552. Its totient is φ = 180018181904652.

The previous prime is 210021212222069. The next prime is 210021212222111. The reversal of 210021212222101 is 101222212120012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 210021212222101 - 2⁵ = 210021212222069 is a prime.

It is a super-3 number, since 3×210021212222101³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021212222111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15001515158715 + ... + 15001515158728.

It is an arithmetic number, because the mean of its divisors is an integer number (60006060634888).

Almost surely, 2^{210021212222101} is an apocalyptic number.

It is an amenable number.

210021212222101 is a deficient number, since it is larger than the sum of its proper divisors (30003030317451).

210021212222101 is an equidigital number, since it uses as much as digits as its factorization.

210021212222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30003030317450.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210021212222101 its reverse (101222212120012), we get a palindrome (311243424342113).

The spelling of 210021212222101 in words is "two hundred ten trillion, twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, one hundred one".