201021110021000 has 32 divisors (see below), whose sum is σ = 470389397451480. Its totient is φ = 80408444008000.

The previous prime is 201021110020979. The next prime is 201021110021023. The reversal of 201021110021000 is 120011120102.

It can be written as a sum of positive squares in 4 ways, for example, as 72935801740516 + 128085308280484 = 8540246^2 + 11317478^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100510554011 + ... + 100510556010.

Almost surely, 2^{201021110021000} is an apocalyptic number.

201021110021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201021110021000 is an abundant number, since it is smaller than the sum of its proper divisors (269368287430480).

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

201021110021000 is a wasteful number, since it uses less digits than its factorization.

201021110021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201021110042 (or 201021110028 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201021110021000 its reverse (120011120102), we get a palindrome (201141121141102).

The spelling of 201021110021000 in words is "two hundred one trillion, twenty-one billion, one hundred ten million, twenty-one thousand".