212201111021001 has 16 divisors (see below), whose sum is σ = 299579502067200. Its totient is φ = 133145144937728.

The previous prime is 212201111020981. The next prime is 212201111021023. The reversal of 212201111021001 is 100120111102212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212201111021001 - 2¹³ = 212201111012809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212201111001001) 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, 494695 + ... + 20606963.

It is an arithmetic number, because the mean of its divisors is an integer number (18723718879200).

Almost surely, 2^{212201111021001} is an apocalyptic number.

It is an amenable number.

212201111021001 is a deficient number, since it is larger than the sum of its proper divisors (87378391046199).

212201111021001 is a wasteful number, since it uses less digits than its factorization.

212201111021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20319168.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212201111021001 its reverse (100120111102212), we get a palindrome (312321222123213).

The spelling of 212201111021001 in words is "two hundred twelve trillion, two hundred one billion, one hundred eleven million, twenty-one thousand, one".