421101131550511 has 4 divisors (see below), whose sum is σ = 421132915180000. Its totient is φ = 421069347921024.

The previous prime is 421101131550497. The next prime is 421101131550557. The reversal of 421101131550511 is 115055131101124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421101131550511 - 2¹⁵ = 421101131517743 is a prime.

It is a super-2 number, since 2×421101131550511² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421101131550311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15891794871 + ... + 15891821368.

It is an arithmetic number, because the mean of its divisors is an integer number (105283228795000).

Almost surely, 2^{421101131550511} is an apocalyptic number.

421101131550511 is a deficient number, since it is larger than the sum of its proper divisors (31783629489).

421101131550511 is a wasteful number, since it uses less digits than its factorization.

421101131550511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31783629488.

The product of its (nonzero) digits is 3000, while the sum is 31.

Adding to 421101131550511 its reverse (115055131101124), we get a palindrome (536156262651635).

The spelling of 421101131550511 in words is "four hundred twenty-one trillion, one hundred one billion, one hundred thirty-one million, five hundred fifty thousand, five hundred eleven".