1202100421 has 2 divisors, whose sum is σ = 1202100422. Its totient is φ = 1202100420.

The previous prime is 1202100407. The next prime is 1202100433. The reversal of 1202100421 is 1240012021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 706815396 + 495285025 = 26586^2 + 22255^2 .

It is an emirp because it is prime and its reverse (1240012021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1202100421 - 2⁷ = 1202100293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202110421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601050210 + 601050211.

It is an arithmetic number, because the mean of its divisors is an integer number (601050211).

Almost surely, 2^1202100421 is an apocalyptic number.

It is an amenable number.

1202100421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202100421 is an equidigital number, since it uses as much as digits as its factorization.

1202100421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1202100421 is about 34671.3198623877. The cubic root of 1202100421 is about 1063.2782162272.

Adding to 1202100421 its reverse (1240012021), we get a palindrome (2442112442).

The spelling of 1202100421 in words is "one billion, two hundred two million, one hundred thousand, four hundred twenty-one".