10421203400421 has 16 divisors (see below), whose sum is σ = 15299778659328. Its totient is φ = 6256853922800.

The previous prime is 10421203400407. The next prime is 10421203400467. The reversal of 10421203400421 is 12400430212401.

It is a cyclic number.

It is not a de Polignac number, because 10421203400421 - 2²¹ = 10421201303269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10421203400391 and 10421203400400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10421203400401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1475669565 + ... + 1475676626.

It is an arithmetic number, because the mean of its divisors is an integer number (956236166208).

Almost surely, 2^{10421203400421} is an apocalyptic number.

10421203400421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10421203400421 is a deficient number, since it is larger than the sum of its proper divisors (4878575258907).

10421203400421 is a wasteful number, since it uses less digits than its factorization.

10421203400421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951346312.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 10421203400421 its reverse (12400430212401), we get a palindrome (22821633612822).

The spelling of 10421203400421 in words is "ten trillion, four hundred twenty-one billion, two hundred three million, four hundred thousand, four hundred twenty-one".