1212023146 has 4 divisors (see below), whose sum is σ = 1818034722. Its totient is φ = 606011572.

The previous prime is 1212023123. The next prime is 1212023173. The reversal of 1212023146 is 6413202121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6413202121 = 61 ⋅105134461.

It can be written as a sum of positive squares in only one way, i.e., 612018121 + 600005025 = 24739^2 + 24495^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303005785 + ... + 303005788.

Almost surely, 2^1212023146 is an apocalyptic number.

1212023146 is a deficient number, since it is larger than the sum of its proper divisors (606011576).

1212023146 is an equidigital number, since it uses as much as digits as its factorization.

1212023146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606011575.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1212023146 is about 34814.1227952106. The cubic root of 1212023146 is about 1066.1958093464.

Adding to 1212023146 its reverse (6413202121), we get a palindrome (7625225267).

The spelling of 1212023146 in words is "one billion, two hundred twelve million, twenty-three thousand, one hundred forty-six".