21353112424102 has 4 divisors (see below), whose sum is σ = 32029668636156. Its totient is φ = 10676556212050.

The previous prime is 21353112424037. The next prime is 21353112424157. The reversal of 21353112424102 is 20142421135312.

It is a semiprime because it is the product of two primes.

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, 5338278106024 + ... + 5338278106027.

It is an arithmetic number, because the mean of its divisors is an integer number (8007417159039).

Almost surely, 2^{21353112424102} is an apocalyptic number.

21353112424102 is a deficient number, since it is larger than the sum of its proper divisors (10676556212054).

21353112424102 is a wasteful number, since it uses less digits than its factorization.

21353112424102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10676556212053.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 21353112424102 its reverse (20142421135312), we get a palindrome (41495533559414).

The spelling of 21353112424102 in words is "twenty-one trillion, three hundred fifty-three billion, one hundred twelve million, four hundred twenty-four thousand, one hundred two".