102211201020121 has 4 divisors (see below), whose sum is σ = 102327747430372. Its totient is φ = 102094654609872.

The previous prime is 102211201020119. The next prime is 102211201020179. The reversal of 102211201020121 is 121020102112201.

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 76131907129600 + 26079293890521 = 8725360^2 + 5106789^2 .

It is a cyclic number.

It is not a de Polignac number, because 102211201020121 - 2¹ = 102211201020119 is a prime.

It is a super-2 number, since 2×102211201020121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102211201020095 and 102211201020104.

It is not an unprimeable number, because it can be changed into a prime (102211201029121) 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, 58273203810 + ... + 58273205563.

It is an arithmetic number, because the mean of its divisors is an integer number (25581936857593).

Almost surely, 2^{102211201020121} is an apocalyptic number.

It is an amenable number.

102211201020121 is a deficient number, since it is larger than the sum of its proper divisors (116546410251).

102211201020121 is an equidigital number, since it uses as much as digits as its factorization.

102211201020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116546410250.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102211201020121 its reverse (121020102112201), we get a palindrome (223231303132322).

The spelling of 102211201020121 in words is "one hundred two trillion, two hundred eleven billion, two hundred one million, twenty thousand, one hundred twenty-one".