3911222121201 has 16 divisors (see below), whose sum is σ = 5794641875520. Its totient is φ = 2607373984320.

The previous prime is 3911222121199. The next prime is 3911222121217. The reversal of 3911222121201 is 1021212221193.

3911222121201 is a `hidden beast` number, since 391 + 12 + 221 + 21 + 20 + 1 = 666.

It is not a de Polignac number, because 3911222121201 - 2¹ = 3911222121199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (3911222121101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2313960 + ... + 3629993.

It is an arithmetic number, because the mean of its divisors is an integer number (362165117220).

Almost surely, 2^{3911222121201} is an apocalyptic number.

It is an amenable number.

3911222121201 is a deficient number, since it is larger than the sum of its proper divisors (1883419754319).

3911222121201 is a wasteful number, since it uses less digits than its factorization.

3911222121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968333 (or 5968327 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

Adding to 3911222121201 its reverse (1021212221193), we get a palindrome (4932434342394).

The spelling of 3911222121201 in words is "three trillion, nine hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred one".