1221102151 has 2 divisors, whose sum is σ = 1221102152. Its totient is φ = 1221102150.

The previous prime is 1221102133. The next prime is 1221102187. The reversal of 1221102151 is 1512011221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221102151 - 2⁷ = 1221102023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221103151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610551075 + 610551076.

It is an arithmetic number, because the mean of its divisors is an integer number (610551076).

Almost surely, 2^1221102151 is an apocalyptic number.

1221102151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221102151 is an equidigital number, since it uses as much as digits as its factorization.

1221102151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 1221102151 is about 34944.2720771230. The cubic root of 1221102151 is about 1068.8514040966.

Adding to 1221102151 its reverse (1512011221), we get a palindrome (2733113372).

The spelling of 1221102151 in words is "one billion, two hundred twenty-one million, one hundred two thousand, one hundred fifty-one".