2120212212121 has 16 divisors (see below), whose sum is σ = 2190547022400. Its totient is φ = 2050846495488.

The previous prime is 2120212212103. The next prime is 2120212212133. The reversal of 2120212212121 is 1212122120212.

It is a cyclic number.

It is not a de Polignac number, because 2120212212121 - 2⁷ = 2120212211993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120212212821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13582765 + ... + 13737973.

It is an arithmetic number, because the mean of its divisors is an integer number (136909188900).

Almost surely, 2^{2120212212121} is an apocalyptic number.

It is an amenable number.

2120212212121 is a deficient number, since it is larger than the sum of its proper divisors (70334810279).

2120212212121 is a wasteful number, since it uses less digits than its factorization.

2120212212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158328.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2120212212121 its reverse (1212122120212), we get a palindrome (3332334332333).

The spelling of 2120212212121 in words is "two trillion, one hundred twenty billion, two hundred twelve million, two hundred twelve thousand, one hundred twenty-one".