1222210121 has 16 divisors (see below), whose sum is σ = 1417860288. Its totient is φ = 1041216000.

The previous prime is 1222210097. The next prime is 1222210127. The reversal of 1222210121 is 1210122221.

It is not a de Polignac number, because 1222210121 - 2⁶ = 1222210057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222210096 and 1222210105.

It is not an unprimeable number, because it can be changed into a prime (1222210127) 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, 29546 + ... + 57596.

It is an arithmetic number, because the mean of its divisors is an integer number (88616268).

Almost surely, 2^1222210121 is an apocalyptic number.

1222210121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222210121 is a deficient number, since it is larger than the sum of its proper divisors (195650167).

1222210121 is a wasteful number, since it uses less digits than its factorization.

1222210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28312.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1222210121 is about 34960.1218676366. The cubic root of 1222210121 is about 1069.1745813428.

Adding to 1222210121 its reverse (1210122221), we get a palindrome (2432332342).

The spelling of 1222210121 in words is "one billion, two hundred twenty-two million, two hundred ten thousand, one hundred twenty-one".