1222011212121 has 48 divisors (see below), whose sum is σ = 2106310183680. Its totient is φ = 698176130400.

The previous prime is 1222011212113. The next prime is 1222011212167. The reversal of 1222011212121 is 1212121102221.

It is not a de Polignac number, because 1222011212121 - 2³ = 1222011212113 is a prime.

It is a super-2 number, since 2×1222011212121² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1222011212094 and 1222011212103.

It is not an unprimeable number, because it can be changed into a prime (1222011212321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8230896 + ... + 8378046.

It is an arithmetic number, because the mean of its divisors is an integer number (43881462160).

Almost surely, 2^{1222011212121} is an apocalyptic number.

It is an amenable number.

1222011212121 is a deficient number, since it is larger than the sum of its proper divisors (884298971559).

1222011212121 is a wasteful number, since it uses less digits than its factorization.

1222011212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153451 (or 153438 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1222011212121 its reverse (1212121102221), we get a palindrome (2434132314342).

The spelling of 1222011212121 in words is "one trillion, two hundred twenty-two billion, eleven million, two hundred twelve thousand, one hundred twenty-one".