21062143145421 has 96 divisors (see below), whose sum is σ = 37695176064000. Its totient is φ = 11295497757600.

The previous prime is 21062143145411. The next prime is 21062143145429. The reversal of 21062143145421 is 12454134126012.

21062143145421 is a `hidden beast` number, since 2 + 1 + 0 + 6 + 214 + 3 + 14 + 5 + 421 = 666.

It is not a de Polignac number, because 21062143145421 - 2⁶ = 21062143145357 is a prime.

It is a super-2 number, since 2×21062143145421² (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 (21062143145429) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4597846 + ... + 7953896.

It is an arithmetic number, because the mean of its divisors is an integer number (392658084000).

Almost surely, 2^{21062143145421} is an apocalyptic number.

21062143145421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21062143145421 is a deficient number, since it is larger than the sum of its proper divisors (16633032918579).

21062143145421 is a wasteful number, since it uses less digits than its factorization.

21062143145421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356204 (or 3356187 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 21062143145421 in words is "twenty-one trillion, sixty-two billion, one hundred forty-three million, one hundred forty-five thousand, four hundred twenty-one".