210220121021201 has 4 divisors (see below), whose sum is σ = 210236883662004. Its totient is φ = 210203358380400.

The previous prime is 210220121021191. The next prime is 210220121021243. The reversal of 210220121021201 is 102120121022012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 154753002880576 + 55467118140625 = 12439976^2 + 7447625^2 .

It is a cyclic number.

It is not a de Polignac number, because 210220121021201 - 2⁶ = 210220121021137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210220121021201.

It is not an unprimeable number, because it can be changed into a prime (210220121051201) 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, 8381301590 + ... + 8381326671.

It is an arithmetic number, because the mean of its divisors is an integer number (52559220915501).

Almost surely, 2^{210220121021201} is an apocalyptic number.

It is an amenable number.

210220121021201 is a deficient number, since it is larger than the sum of its proper divisors (16762640803).

210220121021201 is a wasteful number, since it uses less digits than its factorization.

210220121021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16762640802.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210220121021201 its reverse (102120121022012), we get a palindrome (312340242043213).

It can be divided in two parts, 21022012 and 1021201, that multiplied together give a palindrome (21467699676412).

The spelling of 210220121021201 in words is "two hundred ten trillion, two hundred twenty billion, one hundred twenty-one million, twenty-one thousand, two hundred one".