21121201012102 has 8 divisors (see below), whose sum is σ = 31909728148200. Its totient is φ = 10484624962704.

The previous prime is 21121201012057. The next prime is 21121201012111. The reversal of 21121201012102 is 20121010212112.

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

It is a super-2 number, since 2×21121201012102² (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, 37987771327 + ... + 37987771882.

It is an arithmetic number, because the mean of its divisors is an integer number (3988716018525).

Almost surely, 2^{21121201012102} is an apocalyptic number.

21121201012102 is a deficient number, since it is larger than the sum of its proper divisors (10788527136098).

21121201012102 is a wasteful number, since it uses less digits than its factorization.

21121201012102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75975543350.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21121201012102 its reverse (20121010212112), we get a palindrome (41242211224214).

The spelling of 21121201012102 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred one million, twelve thousand, one hundred two".