201100012421 has 16 divisors (see below), whose sum is σ = 255452704128. Its totient is φ = 153744676800.

The previous prime is 201100012343. The next prime is 201100012429. The reversal of 201100012421 is 124210001102.

It is a happy number.

It is not a de Polignac number, because 201100012421 - 2¹⁴ = 201099996037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201100012396 and 201100012405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201100012429) 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, 24634490 + ... + 24642651.

It is an arithmetic number, because the mean of its divisors is an integer number (15965794008).

Almost surely, 2^201100012421 is an apocalyptic number.

It is an amenable number.

201100012421 is a deficient number, since it is larger than the sum of its proper divisors (54352691707).

201100012421 is a wasteful number, since it uses less digits than its factorization.

201100012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49277212.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201100012421 its reverse (124210001102), we get a palindrome (325310013523).

The spelling of 201100012421 in words is "two hundred one billion, one hundred million, twelve thousand, four hundred twenty-one".