2101211200121 has 32 divisors (see below), whose sum is σ = 2369574197760. Its totient is φ = 1846730793600.

The previous prime is 2101211200103. The next prime is 2101211200129. The reversal of 2101211200121 is 1210021121012.

It is not a de Polignac number, because 2101211200121 - 2¹⁰ = 2101211199097 is a prime.

It is a super-2 number, since 2×2101211200121² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2101211200096 and 2101211200105.

It is not an unprimeable number, because it can be changed into a prime (2101211200129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21713981 + ... + 21810533.

It is an arithmetic number, because the mean of its divisors is an integer number (74049193680).

Almost surely, 2^{2101211200121} is an apocalyptic number.

It is an amenable number.

2101211200121 is a deficient number, since it is larger than the sum of its proper divisors (268362997639).

2101211200121 is a wasteful number, since it uses less digits than its factorization.

2101211200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97077.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2101211200121 its reverse (1210021121012), we get a palindrome (3311232321133).

The spelling of 2101211200121 in words is "two trillion, one hundred one billion, two hundred eleven million, two hundred thousand, one hundred twenty-one".