2021421401100 has 72 divisors (see below), whose sum is σ = 6498495475920. Its totient is φ = 539045706240.

The previous prime is 2021421401093. The next prime is 2021421401119. The reversal of 2021421401100 is 11041241202.

2021421401100 is a `hidden beast` number, since 20 + 2 + 142 + 1 + 401 + 100 = 666.

It is a super-2 number, since 2×2021421401100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 374334597 + ... + 374339996.

It is an arithmetic number, because the mean of its divisors is an integer number (90256881610).

Almost surely, 2^{2021421401100} is an apocalyptic number.

2021421401100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021421401100 is an abundant number, since it is smaller than the sum of its proper divisors (4477074074820).

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

2021421401100 is a wasteful number, since it uses less digits than its factorization.

2021421401100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748674616 (or 748674603 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2021421401100 its reverse (11041241202), we get a palindrome (2032462642302).

The spelling of 2021421401100 in words is "two trillion, twenty-one billion, four hundred twenty-one million, four hundred one thousand, one hundred".