211223200401 has 12 divisors (see below), whose sum is σ = 305123092612. Its totient is φ = 140804891136.

The previous prime is 211223200387. The next prime is 211223200421. The reversal of 211223200401 is 104002322112.

It is a happy number.

211223200401 is a `hidden beast` number, since 21 + 1 + 223 + 20 + 0 + 401 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 46407499776 + 164815700625 = 215424^2 + 405975^2 .

It is not a de Polignac number, because 211223200401 - 2⁵ = 211223200369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211223200421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 753856 + ... + 995361.

Almost surely, 2^211223200401 is an apocalyptic number.

It is an amenable number.

211223200401 is a deficient number, since it is larger than the sum of its proper divisors (93899892211).

211223200401 is a wasteful number, since it uses less digits than its factorization.

211223200401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762640 (or 1762637 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 211223200401 its reverse (104002322112), we get a palindrome (315225522513).

The spelling of 211223200401 in words is "two hundred eleven billion, two hundred twenty-three million, two hundred thousand, four hundred one".