2122121012021 has 4 divisors (see below), whose sum is σ = 2123844913344. Its totient is φ = 2120397110700.

The previous prime is 2122121012003. The next prime is 2122121012059. The reversal of 2122121012021 is 1202101212212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2122121012021 - 2⁶ = 2122121011957 is a prime.

It is a super-3 number, since 3×2122121012021³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122121002021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 861948815 + ... + 861951276.

It is an arithmetic number, because the mean of its divisors is an integer number (530961228336).

Almost surely, 2^{2122121012021} is an apocalyptic number.

It is an amenable number.

2122121012021 is a deficient number, since it is larger than the sum of its proper divisors (1723901323).

2122121012021 is a wasteful number, since it uses less digits than its factorization.

2122121012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723901322.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2122121012021 its reverse (1202101212212), we get a palindrome (3324222224233).

The spelling of 2122121012021 in words is "two trillion, one hundred twenty-two billion, one hundred twenty-one million, twelve thousand, twenty-one".