1212216157144 has 32 divisors (see below), whose sum is σ = 2392838910000. Its totient is φ = 574133968512.

The previous prime is 1212216157129. The next prime is 1212216157151. The reversal of 1212216157144 is 4417516122121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685882 + ... + 1701430.

Almost surely, 2^{1212216157144} is an apocalyptic number.

It is an amenable number.

1212216157144 is a deficient number, since it is larger than the sum of its proper divisors (1180622752856).

1212216157144 is a wasteful number, since it uses less digits than its factorization.

1212216157144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023427 (or 1023423 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The spelling of 1212216157144 in words is "one trillion, two hundred twelve billion, two hundred sixteen million, one hundred fifty-seven thousand, one hundred forty-four".