1423421420421 has 32 divisors (see below), whose sum is σ = 2548222967808. Its totient is φ = 682559720640.

The previous prime is 1423421420419. The next prime is 1423421420471. The reversal of 1423421420421 is 1240241243241.

It is not a de Polignac number, because 1423421420421 - 2¹ = 1423421420419 is a prime.

It is a super-2 number, since 2×1423421420421² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423421420411) 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, 236996901 + ... + 237002906.

It is an arithmetic number, because the mean of its divisors is an integer number (79631967744).

Almost surely, 2^{1423421420421} is an apocalyptic number.

1423421420421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1423421420421 is a deficient number, since it is larger than the sum of its proper divisors (1124801547387).

1423421420421 is a wasteful number, since it uses less digits than its factorization.

1423421420421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473999841.

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 1423421420421 its reverse (1240241243241), we get a palindrome (2663662663662).

The spelling of 1423421420421 in words is "one trillion, four hundred twenty-three billion, four hundred twenty-one million, four hundred twenty thousand, four hundred twenty-one".