210202100222121 has 48 divisors (see below), whose sum is σ = 360770784890880. Its totient is φ = 115404527904480.

The previous prime is 210202100222087. The next prime is 210202100222159. The reversal of 210202100222121 is 121222001202012.

It is a happy number.

210202100222121 is a `hidden beast` number, since 21 + 0 + 202 + 100 + 222 + 121 = 666.

It is not a de Polignac number, because 210202100222121 - 2¹⁴ = 210202100205737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210202100222094 and 210202100222103.

It is not an unprimeable number, because it can be changed into a prime (210202102222121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 386888115 + ... + 387431048.

It is an arithmetic number, because the mean of its divisors is an integer number (7516058018560).

Almost surely, 2^{210202100222121} is an apocalyptic number.

210202100222121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210202100222121 is a deficient number, since it is larger than the sum of its proper divisors (150568684668759).

210202100222121 is a wasteful number, since it uses less digits than its factorization.

210202100222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774319346 (or 774319343 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210202100222121 its reverse (121222001202012), we get a palindrome (331424101424133).

The spelling of 210202100222121 in words is "two hundred ten trillion, two hundred two billion, one hundred million, two hundred twenty-two thousand, one hundred twenty-one".