21100012120102 has 16 divisors (see below), whose sum is σ = 31918235778000. Its totient is φ = 10460848200480.

The previous prime is 21100012120097. The next prime is 21100012120133. The reversal of 21100012120102 is 20102121000112.

It is a super-2 number, since 2×21100012120102² (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 7 ways as a sum of consecutive naturals, for example, 61831077 + ... + 62171392.

It is an arithmetic number, because the mean of its divisors is an integer number (1994889736125).

Almost surely, 2^{21100012120102} is an apocalyptic number.

21100012120102 is a deficient number, since it is larger than the sum of its proper divisors (10818223657898).

21100012120102 is a wasteful number, since it uses less digits than its factorization.

21100012120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124003191.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21100012120102 its reverse (20102121000112), we get a palindrome (41202133120214).

The spelling of 21100012120102 in words is "twenty-one trillion, one hundred billion, twelve million, one hundred twenty thousand, one hundred two".