10221212020021 has 8 divisors (see below), whose sum is σ = 10368635770584. Its totient is φ = 10074787752960.

The previous prime is 10221212020003. The next prime is 10221212020043. The reversal of 10221212020021 is 12002021212201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 62107617796 + 10159104402225 = 249214^2 + 3187335^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10221212020021 - 2⁹ = 10221212019509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10221212019977 and 10221212020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221212020081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249850276 + ... + 249891181.

It is an arithmetic number, because the mean of its divisors is an integer number (1296079471323).

Almost surely, 2^{10221212020021} is an apocalyptic number.

It is an amenable number.

10221212020021 is a deficient number, since it is larger than the sum of its proper divisors (147423750563).

10221212020021 is a wasteful number, since it uses less digits than its factorization.

10221212020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499741751.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 10221212020021 its reverse (12002021212201), we get a palindrome (22223233232222).

The spelling of 10221212020021 in words is "ten trillion, two hundred twenty-one billion, two hundred twelve million, twenty thousand, twenty-one".