201121111211204 has 24 divisors (see below), whose sum is σ = 355744660802328. Its totient is φ = 99481448710400.

The previous prime is 201121111211179. The next prime is 201121111211219. The reversal of 201121111211204 is 402112111121102.

It can be written as a sum of positive squares in 4 ways, for example, as 128757132294400 + 72363978916804 = 11347120^2 + 8506702^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208162007 + ... + 209125950.

It is an arithmetic number, because the mean of its divisors is an integer number (14822694200097).

Almost surely, 2^{201121111211204} is an apocalyptic number.

It is an amenable number.

201121111211204 is a deficient number, since it is larger than the sum of its proper divisors (154623549591124).

201121111211204 is a wasteful number, since it uses less digits than its factorization.

201121111211204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417289255 (or 417289253 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 201121111211204 its reverse (402112111121102), we get a palindrome (603233222332306).

The spelling of 201121111211204 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred eleven million, two hundred eleven thousand, two hundred four".