211220000120001 has 96 divisors (see below), whose sum is σ = 316452547208448. Its totient is φ = 125036022988800.

The previous prime is 211220000119981. The next prime is 211220000120023. The reversal of 211220000120001 is 100021000022112.

It is not a de Polignac number, because 211220000120001 - 2¹⁹ = 211219999595713 is a prime.

It is a super-2 number, since 2×211220000120001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211220000120201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 243600705 + ... + 244466241.

It is an arithmetic number, because the mean of its divisors is an integer number (3296380700088).

Almost surely, 2^{211220000120001} is an apocalyptic number.

It is an amenable number.

211220000120001 is a deficient number, since it is larger than the sum of its proper divisors (105232547088447).

211220000120001 is a wasteful number, since it uses less digits than its factorization.

211220000120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865799 (or 865780 counting only the distinct ones).

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

Adding to 211220000120001 its reverse (100021000022112), we get a palindrome (311241000142113).

The spelling of 211220000120001 in words is "two hundred eleven trillion, two hundred twenty billion, one hundred twenty thousand, one".