10212220212021 has 10 divisors (see below), whose sum is σ = 15255291921782. Its totient is φ = 6808146807960.

The previous prime is 10212220212013. The next prime is 10212220212083. The reversal of 10212220212021 is 12021202221201.

It is a happy number.

10212220212021 is a `hidden beast` number, since 1 + 0 + 212 + 220 + 212 + 0 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7158359111121 + 3053861100900 = 2675511^2 + 1747530^2 .

It is not a de Polignac number, because 10212220212021 - 2³ = 10212220212013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10212220211985 and 10212220212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212220212121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 63038396290 + ... + 63038396451.

Almost surely, 2^{10212220212021} is an apocalyptic number.

It is an amenable number.

10212220212021 is a deficient number, since it is larger than the sum of its proper divisors (5043071709761).

10212220212021 is an equidigital number, since it uses as much as digits as its factorization.

10212220212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126076792753 (or 126076792744 counting only the distinct ones).

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

Adding to 10212220212021 its reverse (12021202221201), we get a palindrome (22233422433222).

The spelling of 10212220212021 in words is "ten trillion, two hundred twelve billion, two hundred twenty million, two hundred twelve thousand, twenty-one".