21142143420044 has 6 divisors (see below), whose sum is σ = 36998750985084. Its totient is φ = 10571071710020.

The previous prime is 21142143419963. The next prime is 21142143420109. The reversal of 21142143420044 is 44002434124112.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2642767927502 + ... + 2642767927509.

It is an arithmetic number, because the mean of its divisors is an integer number (6166458497514).

Almost surely, 2^{21142143420044} is an apocalyptic number.

It is an amenable number.

21142143420044 is a deficient number, since it is larger than the sum of its proper divisors (15856607565040).

21142143420044 is a wasteful number, since it uses less digits than its factorization.

21142143420044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285535855015 (or 5285535855013 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 21142143420044 its reverse (44002434124112), we get a palindrome (65144577544156).

The spelling of 21142143420044 in words is "twenty-one trillion, one hundred forty-two billion, one hundred forty-three million, four hundred twenty thousand, forty-four".