1212663141 has 12 divisors (see below), whose sum is σ = 1753353420. Its totient is φ = 807644160.

The previous prime is 1212663131. The next prime is 1212663149. The reversal of 1212663141 is 1413662121.

It is a happy number.

1212663141 is a `hidden beast` number, since 1 + 2 + 1 + 26 + 631 + 4 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 382358916 + 830304225 = 19554^2 + 28815^2 .

It is not a de Polignac number, because 1212663141 - 2¹⁵ = 1212630373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212663149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56796 + ... + 75173.

It is an arithmetic number, because the mean of its divisors is an integer number (146112785).

Almost surely, 2^1212663141 is an apocalyptic number.

It is an amenable number.

1212663141 is a deficient number, since it is larger than the sum of its proper divisors (540690279).

1212663141 is a wasteful number, since it uses less digits than its factorization.

1212663141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132996 (or 132993 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1212663141 is about 34823.3131824070. The cubic root of 1212663141 is about 1066.3834405041.

The spelling of 1212663141 in words is "one billion, two hundred twelve million, six hundred sixty-three thousand, one hundred forty-one".