1212219604 has 72 divisors (see below), whose sum is σ = 2328260760. Its totient is φ = 550996992.

The previous prime is 1212219601. The next prime is 1212219607. The reversal of 1212219604 is 4069122121.

It is an interprime number because it is at equal distance from previous prime (1212219601) and next prime (1212219607).

It can be written as a sum of positive squares in 12 ways, for example, as 1040400 + 1211179204 = 1020^2 + 34802^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212219601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16605712 + ... + 16605784.

It is an arithmetic number, because the mean of its divisors is an integer number (32336955).

Almost surely, 2^1212219604 is an apocalyptic number.

It is an amenable number.

1212219604 is a deficient number, since it is larger than the sum of its proper divisors (1116041156).

1212219604 is a wasteful number, since it uses less digits than its factorization.

1212219604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1212219604 is about 34816.9442082444. The cubic root of 1212219604 is about 1066.2534131363.

The spelling of 1212219604 in words is "one billion, two hundred twelve million, two hundred nineteen thousand, six hundred four".