201422100 has 144 divisors (see below), whose sum is σ = 645958656. Its totient is φ = 48048000.

The previous prime is 201422093. The next prime is 201422147. The reversal of 201422100 is 1224102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 220645 + ... + 221555.

It is an arithmetic number, because the mean of its divisors is an integer number (4485824).

Almost surely, 2^201422100 is an apocalyptic number.

201422100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201422100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322979328).

201422100 is an abundant number, since it is smaller than the sum of its proper divisors (444536556).

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

201422100 is a wasteful number, since it uses less digits than its factorization.

201422100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 999 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 201422100 is about 14192.3253908583. The cubic root of 201422100 is about 586.1863571891.

Adding to 201422100 its reverse (1224102), we get a palindrome (202646202).

The spelling of 201422100 in words is "two hundred one million, four hundred twenty-two thousand, one hundred".