210121111101002 has 16 divisors (see below), whose sum is σ = 315588498729192. Its totient is φ = 104924980885440.

The previous prime is 210121111101001. The next prime is 210121111101047. The reversal of 210121111101002 is 200101111121012.

It can be written as a sum of positive squares in 4 ways, for example, as 79594393421761 + 130526717679241 = 8921569^2 + 11424829^2 .

It is not an unprimeable number, because it can be changed into a prime (210121111101001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2666252 + ... + 20672472.

Almost surely, 2^{210121111101002} is an apocalyptic number.

210121111101002 is a deficient number, since it is larger than the sum of its proper divisors (105467387628190).

210121111101002 is a wasteful number, since it uses less digits than its factorization.

210121111101002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18013753.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 210121111101002 its reverse (200101111121012), we get a palindrome (410222222222014).

The spelling of 210121111101002 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred eleven million, one hundred one thousand, two".