210202120212021 has 96 divisors (see below), whose sum is σ = 356221198884096. Its totient is φ = 116936265600000.

The previous prime is 210202120212011. The next prime is 210202120212061. The reversal of 210202120212021 is 120212021202012.

It is a happy number.

210202120212021 is a `hidden beast` number, since 210 + 20 + 212 + 0 + 21 + 202 + 1 = 666.

It is not a de Polignac number, because 210202120212021 - 2⁷ = 210202120211893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210202120211985 and 210202120212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210202120212001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5459634271 + ... + 5459672771.

It is an arithmetic number, because the mean of its divisors is an integer number (3710637488376).

Almost surely, 2^{210202120212021} is an apocalyptic number.

210202120212021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210202120212021 is a deficient number, since it is larger than the sum of its proper divisors (146019078672075).

210202120212021 is a wasteful number, since it uses less digits than its factorization.

210202120212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43003 (or 43000 counting only the distinct ones).

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

Adding to 210202120212021 its reverse (120212021202012), we get a palindrome (330414141414033).

The spelling of 210202120212021 in words is "two hundred ten trillion, two hundred two billion, one hundred twenty million, two hundred twelve thousand, twenty-one".