21477440125411 has 2 divisors, whose sum is σ = 21477440125412. Its totient is φ = 21477440125410.

The previous prime is 21477440125387. The next prime is 21477440125439. The reversal of 21477440125411 is 11452104477412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21477440125411 - 2³⁷ = 21340001171939 is a prime.

It is a super-2 number, since 2×21477440125411² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21477440125441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10738720062705 + 10738720062706.

It is an arithmetic number, because the mean of its divisors is an integer number (10738720062706).

Almost surely, 2^{21477440125411} is an apocalyptic number.

21477440125411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21477440125411 is an equidigital number, since it uses as much as digits as its factorization.

21477440125411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250880, while the sum is 43.

The spelling of 21477440125411 in words is "twenty-one trillion, four hundred seventy-seven billion, four hundred forty million, one hundred twenty-five thousand, four hundred eleven".