121222211122210 has 16 divisors (see below), whose sum is σ = 238036341840192. Its totient is φ = 44080804044400.

The previous prime is 121222211122193. The next prime is 121222211122247. The reversal of 121222211122210 is 12221112222121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551010050446 + ... + 551010050665.

It is an arithmetic number, because the mean of its divisors is an integer number (14877271365012).

Almost surely, 2^{121222211122210} is an apocalyptic number.

121222211122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121222211122210 is a deficient number, since it is larger than the sum of its proper divisors (116814130717982).

121222211122210 is a wasteful number, since it uses less digits than its factorization.

121222211122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102020101129.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 121222211122210 its reverse (12221112222121), we get a palindrome (133443323344331).

The spelling of 121222211122210 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, one hundred twenty-two thousand, two hundred ten".