1212002290 has 16 divisors (see below), whose sum is σ = 2217369240. Its totient is φ = 476853120.

The previous prime is 1212002269. The next prime is 1212002291. The reversal of 1212002290 is 922002121.

It can be written as a sum of positive squares in 4 ways, for example, as 372219849 + 839782441 = 19293^2 + 28979^2 .

It is not an unprimeable number, because it can be changed into a prime (1212002291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992835 + ... + 994054.

Almost surely, 2^1212002290 is an apocalyptic number.

1212002290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212002290 is a deficient number, since it is larger than the sum of its proper divisors (1005366950).

1212002290 is a wasteful number, since it uses less digits than its factorization.

1212002290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986957.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1212002290 is about 34813.8232603085. The cubic root of 1212002290 is about 1066.1896937571.

The spelling of 1212002290 in words is "one billion, two hundred twelve million, two thousand, two hundred ninety".