2121211012121 has 8 divisors (see below), whose sum is σ = 2157278659200. Its totient is φ = 2085147195760.

The previous prime is 2121211012099. The next prime is 2121211012199. The reversal of 2121211012121 is 1212101121212.

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 2121211012121 - 2³⁴ = 2104031142937 is a prime.

It is a super-3 number, since 3×2121211012121³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121211012121.

It is not an unprimeable number, because it can be changed into a prime (2121211011121) 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, 170411 + ... + 2066751.

It is an arithmetic number, because the mean of its divisors is an integer number (269659832400).

Almost surely, 2^{2121211012121} is an apocalyptic number.

It is an amenable number.

2121211012121 is a deficient number, since it is larger than the sum of its proper divisors (36067647079).

2121211012121 is a wasteful number, since it uses less digits than its factorization.

2121211012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915359.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2121211012121 its reverse (1212101121212), we get a palindrome (3333312133333).

The spelling of 2121211012121 in words is "two trillion, one hundred twenty-one billion, two hundred eleven million, twelve thousand, one hundred twenty-one".