1220021020010 has 24 divisors (see below), whose sum is σ = 2377958133420. Its totient is φ = 450469299072.

The previous prime is 1220021020003. The next prime is 1220021020073. The reversal of 1220021020010 is 100201200221.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 64389570001 + 1155631450009 = 253751^2 + 1075003^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220021019973 and 1220021020000.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360951275 + ... + 360954654.

Almost surely, 2^{1220021020010} is an apocalyptic number.

1220021020010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220021020010 is a deficient number, since it is larger than the sum of its proper divisors (1157937113410).

1220021020010 is a wasteful number, since it uses less digits than its factorization.

1220021020010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721905962 (or 721905949 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1220021020010 its reverse (100201200221), we get a palindrome (1320222220231).

The spelling of 1220021020010 in words is "one trillion, two hundred twenty billion, twenty-one million, twenty thousand, ten".