1121620206 has 32 divisors (see below), whose sum is σ = 2567243520. Its totient is φ = 320020416.

The previous prime is 1121620189. The next prime is 1121620223. The reversal of 1121620206 is 6020261211.

It is an interprime number because it is at equal distance from previous prime (1121620189) and next prime (1121620223).

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 12970 + ... + 49106.

It is an arithmetic number, because the mean of its divisors is an integer number (80226360).

Almost surely, 2^1121620206 is an apocalyptic number.

1121620206 is an abundant number, since it is smaller than the sum of its proper divisors (1445623314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121620206 is a wasteful number, since it uses less digits than its factorization.

1121620206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36888.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1121620206 is about 33490.5987704012. The cubic root of 1121620206 is about 1038.9993475497. Note that the first 3 decimals are identical.

Adding to 1121620206 its reverse (6020261211), we get a palindrome (7141881417).

The spelling of 1121620206 in words is "one billion, one hundred twenty-one million, six hundred twenty thousand, two hundred six".