1200021220010 has 16 divisors (see below), whose sum is σ = 2287099266696. Its totient is φ = 451772694528.

The previous prime is 1200021219989. The next prime is 1200021220031. The reversal of 1200021220010 is 100221200021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1200021219989) and next prime (1200021220031).

It can be written as a sum of positive squares in 4 ways, for example, as 1062596057329 + 137425162681 = 1030823^2 + 370709^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1200021219973 and 1200021220000.

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, 3529474007 + ... + 3529474346.

Almost surely, 2^{1200021220010} is an apocalyptic number.

1200021220010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200021220010 is a deficient number, since it is larger than the sum of its proper divisors (1087078046686).

1200021220010 is a wasteful number, since it uses less digits than its factorization.

1200021220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7058948377.

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

Adding to 1200021220010 its reverse (100221200021), we get a palindrome (1300242420031).

The spelling of 1200021220010 in words is "one trillion, two hundred billion, twenty-one million, two hundred twenty thousand, ten".