1220212837 has 2 divisors, whose sum is σ = 1220212838. Its totient is φ = 1220212836.

The previous prime is 1220212801. The next prime is 1220212853. The reversal of 1220212837 is 7382120221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 900840196 + 319372641 = 30014^2 + 17871^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220212837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220212867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610106418 + 610106419.

It is an arithmetic number, because the mean of its divisors is an integer number (610106419).

Almost surely, 2^1220212837 is an apocalyptic number.

It is an amenable number.

1220212837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220212837 is an equidigital number, since it uses as much as digits as its factorization.

1220212837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1220212837 is about 34931.5450130681. The cubic root of 1220212837 is about 1068.5918638752.

The spelling of 1220212837 in words is "one billion, two hundred twenty million, two hundred twelve thousand, eight hundred thirty-seven".