10010212001221 has 4 divisors (see below), whose sum is σ = 10010352493792. Its totient is φ = 10010071508652.

The previous prime is 10010212001219. The next prime is 10010212001233. The reversal of 10010212001221 is 12210021201001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10010212001221 - 2¹ = 10010212001219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10010212001821) 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, 70139355 + ... + 70281928.

It is an arithmetic number, because the mean of its divisors is an integer number (2502588123448).

Almost surely, 2^{10010212001221} is an apocalyptic number.

It is an amenable number.

10010212001221 is a deficient number, since it is larger than the sum of its proper divisors (140492571).

10010212001221 is an equidigital number, since it uses as much as digits as its factorization.

10010212001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140492570.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10010212001221 its reverse (12210021201001), we get a palindrome (22220233202222).

The spelling of 10010212001221 in words is "ten trillion, ten billion, two hundred twelve million, one thousand, two hundred twenty-one".