1212021122210 has 32 divisors (see below), whose sum is σ = 2315788360560. Its totient is φ = 455140933632.

The previous prime is 1212021122173. The next prime is 1212021122281. The reversal of 1212021122210 is 122211202121.

It can be written as a sum of positive squares in 8 ways, for example, as 771567235321 + 440453886889 = 878389^2 + 663667^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8911775 + ... + 9046754.

Almost surely, 2^{1212021122210} is an apocalyptic number.

1212021122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212021122210 is a deficient number, since it is larger than the sum of its proper divisors (1103767238350).

1212021122210 is a wasteful number, since it uses less digits than its factorization.

1212021122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17958950.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212021122210 its reverse (122211202121), we get a palindrome (1334232324331).

The spelling of 1212021122210 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred twenty-two thousand, two hundred ten".