2121120002121 has 8 divisors (see below), whose sum is σ = 2828210010240. Its totient is φ = 1414054997712.

The previous prime is 2121120002119. The next prime is 2121120002171. The reversal of 2121120002121 is 1212000211212.

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

It is not a de Polignac number, because 2121120002121 - 2¹ = 2121120002119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121120002121.

It is not an unprimeable number, because it can be changed into a prime (2121120002171) 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, 6052081 + ... + 6392958.

It is an arithmetic number, because the mean of its divisors is an integer number (353526251280).

Almost surely, 2^{2121120002121} is an apocalyptic number.

It is an amenable number.

2121120002121 is a deficient number, since it is larger than the sum of its proper divisors (707090008119).

2121120002121 is a wasteful number, since it uses less digits than its factorization.

2121120002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12501855.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2121120002121 its reverse (1212000211212), we get a palindrome (3333120213333).

The spelling of 2121120002121 in words is "two trillion, one hundred twenty-one billion, one hundred twenty million, two thousand, one hundred twenty-one".