21121431430102 has 8 divisors (see below), whose sum is σ = 31871860601616. Its totient is φ = 10497477896232.

The previous prime is 21121431430097. The next prime is 21121431430147. The reversal of 21121431430102 is 20103413412112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21121431430102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31618908993 + ... + 31618909660.

It is an arithmetic number, because the mean of its divisors is an integer number (3983982575202).

Almost surely, 2^{21121431430102} is an apocalyptic number.

21121431430102 is a deficient number, since it is larger than the sum of its proper divisors (10750429171514).

21121431430102 is a wasteful number, since it uses less digits than its factorization.

21121431430102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63237818822.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21121431430102 its reverse (20103413412112), we get a palindrome (41224844842214).

The spelling of 21121431430102 in words is "twenty-one trillion, one hundred twenty-one billion, four hundred thirty-one million, four hundred thirty thousand, one hundred two".