21254533545212 has 24 divisors (see below), whose sum is σ = 40577098912560. Its totient is φ = 9661089196160.

The previous prime is 21254533545169. The next prime is 21254533545233.

21254533545212 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5708114 + ... + 8665542.

It is an arithmetic number, because the mean of its divisors is an integer number (1690712454690).

Almost surely, 2^{21254533545212} is an apocalyptic number.

21254533545212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21254533545212 is a deficient number, since it is larger than the sum of its proper divisors (19322565367348).

21254533545212 is a wasteful number, since it uses less digits than its factorization.

21254533545212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120781 (or 3120779 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 44.

The spelling of 21254533545212 in words is "twenty-one trillion, two hundred fifty-four billion, five hundred thirty-three million, five hundred forty-five thousand, two hundred twelve".