1212422151 has 16 divisors (see below), whose sum is σ = 1655772800. Its totient is φ = 788898528.

The previous prime is 1212422147. The next prime is 1212422191. The reversal of 1212422151 is 1512242121.

It is not a de Polignac number, because 1212422151 - 2² = 1212422147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212422191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5761 + ... + 49578.

It is an arithmetic number, because the mean of its divisors is an integer number (103485800).

Almost surely, 2^1212422151 is an apocalyptic number.

1212422151 is a deficient number, since it is larger than the sum of its proper divisors (443350649).

1212422151 is a wasteful number, since it uses less digits than its factorization.

1212422151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55518.

The product of its digits is 320, while the sum is 21.

The square root of 1212422151 is about 34819.8528285230. The cubic root of 1212422151 is about 1066.3127957768.

Adding to 1212422151 its reverse (1512242121), we get a palindrome (2724664272).

The spelling of 1212422151 in words is "one billion, two hundred twelve million, four hundred twenty-two thousand, one hundred fifty-one".