210040401021 has 32 divisors (see below), whose sum is σ = 316090926720. Its totient is φ = 122891059200.

The previous prime is 210040401007. The next prime is 210040401047. The reversal of 210040401021 is 120104040012.

It is not a de Polignac number, because 210040401021 - 2¹⁵ = 210040368253 is a prime.

It is a super-2 number, since 2×210040401021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210040401001) 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, 13927341 + ... + 13942413.

It is an arithmetic number, because the mean of its divisors is an integer number (9877841460).

Almost surely, 2^210040401021 is an apocalyptic number.

It is an amenable number.

210040401021 is a deficient number, since it is larger than the sum of its proper divisors (106050525699).

210040401021 is a wasteful number, since it uses less digits than its factorization.

210040401021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29677.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 210040401021 its reverse (120104040012), we get a palindrome (330144441033).

The spelling of 210040401021 in words is "two hundred ten billion, forty million, four hundred one thousand, twenty-one".