2121222021010 has 16 divisors (see below), whose sum is σ = 3818400211800. Its totient is φ = 848444236416.

The previous prime is 2121222021007. The next prime is 2121222021011. The reversal of 2121222021010 is 101202221212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2118570491961 + 2651529049 = 1455531^2 + 51493^2 .

It is not an unprimeable number, because it can be changed into a prime (2121222021011) 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, 5371275 + ... + 5752654.

Almost surely, 2^{2121222021010} is an apocalyptic number.

2121222021010 is a deficient number, since it is larger than the sum of its proper divisors (1697178190790).

2121222021010 is a wasteful number, since it uses less digits than its factorization.

2121222021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11143005.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2121222021010 its reverse (101202221212), we get a palindrome (2222424242222).

The spelling of 2121222021010 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, twenty-one thousand, ten".