2101222111021 has 16 divisors (see below), whose sum is σ = 2360317333248. Its totient is φ = 1853955532800.

The previous prime is 2101222110997. The next prime is 2101222111063. The reversal of 2101222111021 is 1201112221012.

It is a cyclic number.

It is not a de Polignac number, because 2101222111021 - 2¹⁷ = 2101221979949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101222110986 and 2101222111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101222111081) 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, 11982981 + ... + 12157066.

It is an arithmetic number, because the mean of its divisors is an integer number (147519833328).

Almost surely, 2^{2101222111021} is an apocalyptic number.

It is an amenable number.

2101222111021 is a deficient number, since it is larger than the sum of its proper divisors (259095222227).

2101222111021 is a wasteful number, since it uses less digits than its factorization.

2101222111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24140292.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2101222111021 its reverse (1201112221012), we get a palindrome (3302334332033).

The spelling of 2101222111021 in words is "two trillion, one hundred one billion, two hundred twenty-two million, one hundred eleven thousand, twenty-one".