10220212021 has 4 divisors (see below), whose sum is σ = 10220431500. Its totient is φ = 10219992544.

The previous prime is 10220212003. The next prime is 10220212049. The reversal of 10220212021 is 12021202201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12021202201 = 41057 ⋅292793.

It can be written as a sum of positive squares in 2 ways, for example, as 3758303025 + 6461908996 = 61305^2 + 80386^2 .

It is a cyclic number.

It is not a de Polignac number, because 10220212021 - 2²¹ = 10218114869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10220211992 and 10220212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10220216021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9166 + ... + 143263.

It is an arithmetic number, because the mean of its divisors is an integer number (2555107875).

Almost surely, 2^10220212021 is an apocalyptic number.

It is an amenable number.

10220212021 is a deficient number, since it is larger than the sum of its proper divisors (219479).

10220212021 is an equidigital number, since it uses as much as digits as its factorization.

10220212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219478.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10220212021 its reverse (12021202201), we get a palindrome (22241414222).

The spelling of 10220212021 in words is "ten billion, two hundred twenty million, two hundred twelve thousand, twenty-one".