2101221121002 has 32 divisors (see below), whose sum is σ = 4205449160640. Its totient is φ = 699906007680.

The previous prime is 2101221120997. The next prime is 2101221121009. The reversal of 2101221121002 is 2001211221012.

It is not an unprimeable number, because it can be changed into a prime (2101221121009) 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, 145014574 + ... + 145029062.

It is an arithmetic number, because the mean of its divisors is an integer number (131420286270).

Almost surely, 2^{2101221121002} is an apocalyptic number.

2101221121002 is an abundant number, since it is smaller than the sum of its proper divisors (2104228039638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2101221121002 is a wasteful number, since it uses less digits than its factorization.

2101221121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30118.

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

Adding to 2101221121002 its reverse (2001211221012), we get a palindrome (4102432342014).

The spelling of 2101221121002 in words is "two trillion, one hundred one billion, two hundred twenty-one million, one hundred twenty-one thousand, two".