1220121210110 has 32 divisors (see below), whose sum is σ = 2431633709952. Its totient is φ = 437058341280.

The previous prime is 1220121210101. The next prime is 1220121210137. The reversal of 1220121210110 is 110121210221.

It is a congruent number.

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, 82768832 + ... + 82783571.

It is an arithmetic number, because the mean of its divisors is an integer number (75988553436).

Almost surely, 2^{1220121210110} is an apocalyptic number.

1220121210110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220121210110 is a deficient number, since it is larger than the sum of its proper divisors (1211512499842).

1220121210110 is a wasteful number, since it uses less digits than its factorization.

1220121210110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165552488.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1220121210110 its reverse (110121210221), we get a palindrome (1330242420331).

The spelling of 1220121210110 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, two hundred ten thousand, one hundred ten".