1202120251 has 2 divisors, whose sum is σ = 1202120252. Its totient is φ = 1202120250.

The previous prime is 1202120243. The next prime is 1202120279. The reversal of 1202120251 is 1520212021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1202120251 - 2³ = 1202120243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1202150251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601060125 + 601060126.

It is an arithmetic number, because the mean of its divisors is an integer number (601060126).

Almost surely, 2^1202120251 is an apocalyptic number.

1202120251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202120251 is an equidigital number, since it uses as much as digits as its factorization.

1202120251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1202120251 is about 34671.6058324387. The cubic root of 1202120251 is about 1063.2840628522.

Adding to 1202120251 its reverse (1520212021), we get a palindrome (2722332272).

The spelling of 1202120251 in words is "one billion, two hundred two million, one hundred twenty thousand, two hundred fifty-one".