2101220404102 has 16 divisors (see below), whose sum is σ = 3298183647840. Its totient is φ = 1002084658432.

The previous prime is 2101220404043. The next prime is 2101220404133. The reversal of 2101220404102 is 2014040221012.

It is a super-2 number, since 2×2101220404102² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2101220404102.

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, 64684477 + ... + 64716952.

It is an arithmetic number, because the mean of its divisors is an integer number (206136477990).

Almost surely, 2^{2101220404102} is an apocalyptic number.

2101220404102 is a deficient number, since it is larger than the sum of its proper divisors (1196963243738).

2101220404102 is a wasteful number, since it uses less digits than its factorization.

2101220404102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129401807.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2101220404102 its reverse (2014040221012), we get a palindrome (4115260625114).

The spelling of 2101220404102 in words is "two trillion, one hundred one billion, two hundred twenty million, four hundred four thousand, one hundred two".