21142102342100 has 36 divisors (see below), whose sum is σ = 46563113769984. Its totient is φ = 8330619427680.

The previous prime is 21142102342093. The next prime is 21142102342183. The reversal of 21142102342100 is 124320124112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1577762132 + ... + 1577775531.

It is an arithmetic number, because the mean of its divisors is an integer number (1293419826944).

Almost surely, 2^{21142102342100} is an apocalyptic number.

21142102342100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21142102342100 is an abundant number, since it is smaller than the sum of its proper divisors (25421011427884).

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

21142102342100 is a wasteful number, since it uses less digits than its factorization.

21142102342100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155537744 (or 3155537737 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21142102342100 its reverse (124320124112), we get a palindrome (21266422466212).

The spelling of 21142102342100 in words is "twenty-one trillion, one hundred forty-two billion, one hundred two million, three hundred forty-two thousand, one hundred".