1210201022021 has 6 divisors (see below), whose sum is σ = 1285576864530. Its totient is φ = 1139012726336.

The previous prime is 1210201021993. The next prime is 1210201022033. The reversal of 1210201022021 is 1202201020121.

It can be written as a sum of positive squares in 3 ways, for example, as 798948157921 + 411252864100 = 893839^2 + 641290^2 .

It is not a de Polignac number, because 1210201022021 - 2⁶ = 1210201021957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210201021987 and 1210201022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210200022021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2093773106 + ... + 2093773683.

It is an arithmetic number, because the mean of its divisors is an integer number (214262810755).

Almost surely, 2^{1210201022021} is an apocalyptic number.

It is an amenable number.

1210201022021 is a deficient number, since it is larger than the sum of its proper divisors (75375842509).

1210201022021 is an equidigital number, since it uses as much as digits as its factorization.

1210201022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187546823 (or 4187546806 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1210201022021 its reverse (1202201020121), we get a palindrome (2412402042142).

The spelling of 1210201022021 in words is "one trillion, two hundred ten billion, two hundred one million, twenty-two thousand, twenty-one".