2121012021224 has 8 divisors (see below), whose sum is σ = 3976897539810. Its totient is φ = 1060506010608.

The previous prime is 2121012021209. The next prime is 2121012021259. The reversal of 2121012021224 is 4221202101212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2003589292324 + 117422728900 = 1415482^2 + 342670^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2121012021196 and 2121012021205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132563251319 + ... + 132563251334.

Almost surely, 2^{2121012021224} is an apocalyptic number.

It is an amenable number.

2121012021224 is a deficient number, since it is larger than the sum of its proper divisors (1855885518586).

2121012021224 is a wasteful number, since it uses less digits than its factorization.

2121012021224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265126502659 (or 265126502655 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2121012021224 its reverse (4221202101212), we get a palindrome (6342214122436).

The spelling of 2121012021224 in words is "two trillion, one hundred twenty-one billion, twelve million, twenty-one thousand, two hundred twenty-four".