201122213100 has 36 divisors (see below), whose sum is σ = 581913604104. Its totient is φ = 53632590080.

The previous prime is 201122213077. The next prime is 201122213101. The reversal of 201122213100 is 1312221102.

It is a super-2 number, since 2×201122213100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 201122213100.

It is not an unprimeable number, because it can be changed into a prime (201122213101) 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, 335203389 + ... + 335203988.

Almost surely, 2^201122213100 is an apocalyptic number.

201122213100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201122213100 is an abundant number, since it is smaller than the sum of its proper divisors (380791391004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201122213100 is a wasteful number, since it uses less digits than its factorization.

201122213100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670407394 (or 670407387 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 201122213100 its reverse (1312221102), we get a palindrome (202434434202).

The spelling of 201122213100 in words is "two hundred one billion, one hundred twenty-two million, two hundred thirteen thousand, one hundred".