201021000300021 has 32 divisors (see below), whose sum is σ = 298563083100288. Its totient is φ = 119284897674240.

The previous prime is 201021000300019. The next prime is 201021000300037. The reversal of 201021000300021 is 120003000120102.

It is not a de Polignac number, because 201021000300021 - 2¹ = 201021000300019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021000100021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 304216786 + ... + 304876851.

It is an arithmetic number, because the mean of its divisors is an integer number (9330096346884).

Almost surely, 2^{201021000300021} is an apocalyptic number.

It is an amenable number.

201021000300021 is a deficient number, since it is larger than the sum of its proper divisors (97542082800267).

201021000300021 is a wasteful number, since it uses less digits than its factorization.

201021000300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609093861.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 201021000300021 its reverse (120003000120102), we get a palindrome (321024000420123).

The spelling of 201021000300021 in words is "two hundred one trillion, twenty-one billion, three hundred thousand, twenty-one".