21541541412000 has 96 divisors (see below), whose sum is σ = 70570089705024. Its totient is φ = 5744411040000.

The previous prime is 21541541411969. The next prime is 21541541412011. The reversal of 21541541412000 is 21414514512.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 897552226 + ... + 897576225.

It is an arithmetic number, because the mean of its divisors is an integer number (735105101094).

Almost surely, 2^{21541541412000} is an apocalyptic number.

21541541412000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21541541412000 is an abundant number, since it is smaller than the sum of its proper divisors (49028548293024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21541541412000 is a wasteful number, since it uses less digits than its factorization.

21541541412000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795128479 (or 1795128461 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

Adding to 21541541412000 its reverse (21414514512), we get a palindrome (21562955926512).

The spelling of 21541541412000 in words is "twenty-one trillion, five hundred forty-one billion, five hundred forty-one million, four hundred twelve thousand".