211121100201021 has 8 divisors (see below), whose sum is σ = 281495237406240. Its totient is φ = 140747181564912.

The previous prime is 211121100201013. The next prime is 211121100201139. The reversal of 211121100201021 is 120102001121112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211121100201021 - 2³ = 211121100201013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121100201001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52375015 + ... + 56261748.

It is an arithmetic number, because the mean of its divisors is an integer number (35186904675780).

Almost surely, 2^{211121100201021} is an apocalyptic number.

It is an amenable number.

211121100201021 is a deficient number, since it is larger than the sum of its proper divisors (70374137205219).

211121100201021 is a wasteful number, since it uses less digits than its factorization.

211121100201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109284555.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211121100201021 its reverse (120102001121112), we get a palindrome (331223101322133).

The spelling of 211121100201021 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred million, two hundred one thousand, twenty-one".