2111122221201 has 24 divisors (see below), whose sum is σ = 3485221384320. Its totient is φ = 1206288323136.

The previous prime is 2111122221199. The next prime is 2111122221223. The reversal of 2111122221201 is 1021222211112.

2111122221201 is a `hidden beast` number, since 211 + 11 + 22 + 221 + 201 = 666.

It is not a de Polignac number, because 2111122221201 - 2¹ = 2111122221199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2111122221251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216781 + ... + 2066213.

It is an arithmetic number, because the mean of its divisors is an integer number (145217557680).

Almost surely, 2^{2111122221201} is an apocalyptic number.

2111122221201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2111122221201 is a deficient number, since it is larger than the sum of its proper divisors (1374099163119).

2111122221201 is a wasteful number, since it uses less digits than its factorization.

2111122221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867565 (or 1867562 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2111122221201 its reverse (1021222211112), we get a palindrome (3132344432313).

The spelling of 2111122221201 in words is "two trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred one".