1010002120221 has 4 divisors (see below), whose sum is σ = 1346669493632. Its totient is φ = 673334746812.

The previous prime is 1010002120201. The next prime is 1010002120223. The reversal of 1010002120221 is 1220212000101.

1010002120221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 1010002120221 - 2¹¹ = 1010002118173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010002120197 and 1010002120206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010002120223) 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, 168333686701 + ... + 168333686706.

It is an arithmetic number, because the mean of its divisors is an integer number (336667373408).

Almost surely, 2^{1010002120221} is an apocalyptic number.

It is an amenable number.

1010002120221 is a deficient number, since it is larger than the sum of its proper divisors (336667373411).

1010002120221 is an equidigital number, since it uses as much as digits as its factorization.

1010002120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336667373410.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1010002120221 its reverse (1220212000101), we get a palindrome (2230214120322).

The spelling of 1010002120221 in words is "one trillion, ten billion, two million, one hundred twenty thousand, two hundred twenty-one".