1021200022 has 4 divisors (see below), whose sum is σ = 1531800036. Its totient is φ = 510600010.

The previous prime is 1021200017. The next prime is 1021200031. The reversal of 1021200022 is 2200021201.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1021199981 and 1021200008.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255300004 + ... + 255300007.

It is an arithmetic number, because the mean of its divisors is an integer number (382950009).

Almost surely, 2^1021200022 is an apocalyptic number.

1021200022 is a deficient number, since it is larger than the sum of its proper divisors (510600014).

1021200022 is an equidigital number, since it uses as much as digits as its factorization.

1021200022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510600013.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1021200022 is about 31956.2203960356. The cubic root of 1021200022 is about 1007.0173160910.

Adding to 1021200022 its reverse (2200021201), we get a palindrome (3221221223).

The spelling of 1021200022 in words is "one billion, twenty-one million, two hundred thousand, twenty-two".