1812121150 has 24 divisors (see below), whose sum is σ = 3852052560. Its totient is φ = 621298560.

The previous prime is 1812121147. The next prime is 1812121153. The reversal of 1812121150 is 511212181.

It is an interprime number because it is at equal distance from previous prime (1812121147) and next prime (1812121153).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812121153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2588395 + ... + 2589094.

It is an arithmetic number, because the mean of its divisors is an integer number (160502190).

Almost surely, 2^1812121150 is an apocalyptic number.

1812121150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1812121150 is an abundant number, since it is smaller than the sum of its proper divisors (2039931410).

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

1812121150 is a wasteful number, since it uses less digits than its factorization.

1812121150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5177508 (or 5177503 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 22.

The square root of 1812121150 is about 42569.0163146860. The cubic root of 1812121150 is about 1219.1647848751.

The spelling of 1812121150 in words is "one billion, eight hundred twelve million, one hundred twenty-one thousand, one hundred fifty".