1220021111012 has 48 divisors (see below), whose sum is σ = 2350479479040. Its totient is φ = 549485008800.

The previous prime is 1220021110969. The next prime is 1220021111021. The reversal of 1220021111012 is 2101111200221.

It is a super-2 number, since 2×1220021111012² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3637883 + ... + 3959069.

It is an arithmetic number, because the mean of its divisors is an integer number (48968322480).

Almost surely, 2^{1220021111012} is an apocalyptic number.

It is an amenable number.

1220021111012 is a deficient number, since it is larger than the sum of its proper divisors (1130458368028).

1220021111012 is a wasteful number, since it uses less digits than its factorization.

1220021111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321992 (or 321990 counting only the distinct ones).

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

Adding to 1220021111012 its reverse (2101111200221), we get a palindrome (3321132311233).

The spelling of 1220021111012 in words is "one trillion, two hundred twenty billion, twenty-one million, one hundred eleven thousand, twelve".