201421023220 has 48 divisors (see below), whose sum is σ = 429838617600. Its totient is φ = 79267543040.

The previous prime is 201421023119. The next prime is 201421023269. The reversal of 201421023220 is 22320124102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 532116 + ... + 828244.

It is an arithmetic number, because the mean of its divisors is an integer number (8954971200).

Almost surely, 2^201421023220 is an apocalyptic number.

201421023220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201421023220 is an abundant number, since it is smaller than the sum of its proper divisors (228417594380).

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

201421023220 is a wasteful number, since it uses less digits than its factorization.

201421023220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296688 (or 296686 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 201421023220 its reverse (22320124102), we get a palindrome (223741147322).

The spelling of 201421023220 in words is "two hundred one billion, four hundred twenty-one million, twenty-three thousand, two hundred twenty".