1214521961 has 2 divisors, whose sum is σ = 1214521962. Its totient is φ = 1214521960.

The previous prime is 1214521907. The next prime is 1214521993. The reversal of 1214521961 is 1691254121.

It is an a-pointer prime, because the next prime (1214521993) can be obtained adding 1214521961 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1010031961 + 204490000 = 31781^2 + 14300^2 .

It is a cyclic number.

It is not a de Polignac number, because 1214521961 - 2⁶ = 1214521897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1214521661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607260980 + 607260981.

It is an arithmetic number, because the mean of its divisors is an integer number (607260981).

Almost surely, 2^1214521961 is an apocalyptic number.

It is an amenable number.

1214521961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214521961 is an equidigital number, since it uses as much as digits as its factorization.

1214521961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 32.

The square root of 1214521961 is about 34849.9922668571. The cubic root of 1214521961 is about 1066.9280278273.

The spelling of 1214521961 in words is "one billion, two hundred fourteen million, five hundred twenty-one thousand, nine hundred sixty-one".