1220212351 has 2 divisors, whose sum is σ = 1220212352. Its totient is φ = 1220212350.

The previous prime is 1220212303. The next prime is 1220212361. The reversal of 1220212351 is 1532120221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220212351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220212361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610106175 + 610106176.

It is an arithmetic number, because the mean of its divisors is an integer number (610106176).

Almost surely, 2^1220212351 is an apocalyptic number.

1220212351 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220212351 is an equidigital number, since it uses as much as digits as its factorization.

1220212351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1220212351 is about 34931.5380566044. The cubic root of 1220212351 is about 1068.5917220049.

Adding to 1220212351 its reverse (1532120221), we get a palindrome (2752332572).

The spelling of 1220212351 in words is "one billion, two hundred twenty million, two hundred twelve thousand, three hundred fifty-one".