1222111210021 has 8 divisors (see below), whose sum is σ = 1316129410904. Its totient is φ = 1128094387200.

The previous prime is 1222111209973. The next prime is 1222111210031. The reversal of 1222111210021 is 1200121112221.

It can be written as a sum of positive squares in 4 ways, for example, as 35199012996 + 1186912197025 = 187614^2 + 1089455^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222111210021 - 2²⁹ = 1221574339109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222111209977 and 1222111210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222111210031) 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, 2185621 + ... + 2687221.

It is an arithmetic number, because the mean of its divisors is an integer number (164516176363).

Almost surely, 2^{1222111210021} is an apocalyptic number.

It is an amenable number.

1222111210021 is a deficient number, since it is larger than the sum of its proper divisors (94018200883).

1222111210021 is a wasteful number, since it uses less digits than its factorization.

1222111210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689031.

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

Adding to 1222111210021 its reverse (1200121112221), we get a palindrome (2422232322242).

The spelling of 1222111210021 in words is "one trillion, two hundred twenty-two billion, one hundred eleven million, two hundred ten thousand, twenty-one".