21421210142101 has 32 divisors (see below), whose sum is σ = 26968205721600. Its totient is φ = 16528759922880.

The previous prime is 21421210142081. The next prime is 21421210142183. The reversal of 21421210142101 is 10124101212412.

It is a cyclic number.

It is not a de Polignac number, because 21421210142101 - 2⁵ = 21421210142069 is a prime.

It is a super-2 number, since 2×21421210142101² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21421210142191) 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, 13190190 + ... + 14724928.

It is an arithmetic number, because the mean of its divisors is an integer number (842756428800).

Almost surely, 2^{21421210142101} is an apocalyptic number.

It is an amenable number.

21421210142101 is a deficient number, since it is larger than the sum of its proper divisors (5546995579499).

21421210142101 is a wasteful number, since it uses less digits than its factorization.

21421210142101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536529.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 21421210142101 its reverse (10124101212412), we get a palindrome (31545311354513).

The spelling of 21421210142101 in words is "twenty-one trillion, four hundred twenty-one billion, two hundred ten million, one hundred forty-two thousand, one hundred one".