2100021202121 has 8 divisors (see below), whose sum is σ = 2109332797920. Its totient is φ = 2090710136608.

The previous prime is 2100021202093. The next prime is 2100021202171. The reversal of 2100021202121 is 1212021200012.

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

It is a cyclic number.

It is not a de Polignac number, because 2100021202121 - 2⁶ = 2100021202057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100021202096 and 2100021202105.

It is not an unprimeable number, because it can be changed into a prime (2100021202171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9283085 + ... + 9506613.

It is an arithmetic number, because the mean of its divisors is an integer number (263666599740).

Almost surely, 2^{2100021202121} is an apocalyptic number.

It is an amenable number.

2100021202121 is a deficient number, since it is larger than the sum of its proper divisors (9311595799).

2100021202121 is a wasteful number, since it uses less digits than its factorization.

2100021202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265143.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2100021202121 its reverse (1212021200012), we get a palindrome (3312042402133).

The spelling of 2100021202121 in words is "two trillion, one hundred billion, twenty-one million, two hundred two thousand, one hundred twenty-one".