21142532244124 has 6 divisors (see below), whose sum is σ = 36999431427224. Its totient is φ = 10571266122060.

The previous prime is 21142532244103. The next prime is 21142532244133. The reversal of 21142532244124 is 42144223524112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2642816530512 + ... + 2642816530519.

Almost surely, 2^{21142532244124} is an apocalyptic number.

It is an amenable number.

21142532244124 is a deficient number, since it is larger than the sum of its proper divisors (15856899183100).

21142532244124 is a wasteful number, since it uses less digits than its factorization.

21142532244124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285633061035 (or 5285633061033 counting only the distinct ones).

The product of its digits is 122880, while the sum is 37.

Adding to 21142532244124 its reverse (42144223524112), we get a palindrome (63286755768236).

The spelling of 21142532244124 in words is "twenty-one trillion, one hundred forty-two billion, five hundred thirty-two million, two hundred forty-four thousand, one hundred twenty-four".