10221202012021 has 144 divisors (see below), whose sum is σ = 14241685886064. Its totient is φ = 7264857600000.

The previous prime is 10221202012013. The next prime is 10221202012061. The reversal of 10221202012021 is 12021020212201.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1121915025 + 10220080096996 = 33495^2 + 3196886^2 .

It is not a de Polignac number, because 10221202012021 - 2³ = 10221202012013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10221202011986 and 10221202012004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221202012001) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 5457127741 + ... + 5457129613.

It is an arithmetic number, because the mean of its divisors is an integer number (98900596431).

Almost surely, 2^{10221202012021} is an apocalyptic number.

10221202012021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10221202012021 is a deficient number, since it is larger than the sum of its proper divisors (4020483874043).

10221202012021 is a wasteful number, since it uses less digits than its factorization.

10221202012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724 (or 2706 counting only the distinct ones).

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

Adding to 10221202012021 its reverse (12021020212201), we get a palindrome (22242222224222).

The spelling of 10221202012021 in words is "ten trillion, two hundred twenty-one billion, two hundred two million, twelve thousand, twenty-one".