201213223101 has 24 divisors (see below), whose sum is σ = 317618627040. Its totient is φ = 121733805600.

The previous prime is 201213223097. The next prime is 201213223117. The reversal of 201213223101 is 101322312102.

201213223101 is a `hidden beast` number, since 20 + 12 + 1 + 322 + 310 + 1 = 666.

It is not a de Polignac number, because 201213223101 - 2² = 201213223097 is a prime.

It is a super-2 number, since 2×201213223101² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201213223151) 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, 1723206 + ... + 1836263.

It is an arithmetic number, because the mean of its divisors is an integer number (13234109460).

Almost surely, 2^201213223101 is an apocalyptic number.

It is an amenable number.

201213223101 is a deficient number, since it is larger than the sum of its proper divisors (116405403939).

201213223101 is a wasteful number, since it uses less digits than its factorization.

201213223101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560057 (or 3560054 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201213223101 its reverse (101322312102), we get a palindrome (302535535203).

It can be divided in two parts, 20 and 1213223101, that added together give a palindrome (1213223121).

The spelling of 201213223101 in words is "two hundred one billion, two hundred thirteen million, two hundred twenty-three thousand, one hundred one".