211220232121201 has 4 divisors (see below), whose sum is σ = 213893905945600. Its totient is φ = 208546558296804.

The previous prime is 211220232121193. The next prime is 211220232121229. The reversal of 211220232121201 is 102121232022112.

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 211220232121201 - 2³ = 211220232121193 is a prime.

It is a super-2 number, since 2×211220232121201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211220232121291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1336836912081 + ... + 1336836912238.

It is an arithmetic number, because the mean of its divisors is an integer number (53473476486400).

Almost surely, 2^{211220232121201} is an apocalyptic number.

It is an amenable number.

211220232121201 is a deficient number, since it is larger than the sum of its proper divisors (2673673824399).

211220232121201 is an equidigital number, since it uses as much as digits as its factorization.

211220232121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673673824398.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 211220232121201 its reverse (102121232022112), we get a palindrome (313341464143313).

The spelling of 211220232121201 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred thirty-two million, one hundred twenty-one thousand, two hundred one".