1202113423421 has 2 divisors, whose sum is σ = 1202113423422. Its totient is φ = 1202113423420.

The previous prime is 1202113423411. The next prime is 1202113423453. The reversal of 1202113423421 is 1243243112021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1131138602500 + 70974820921 = 1063550^2 + 266411^2 .

It is an emirp because it is prime and its reverse (1243243112021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1202113423421 - 2²² = 1202109229117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202113423411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601056711710 + 601056711711.

It is an arithmetic number, because the mean of its divisors is an integer number (601056711711).

Almost surely, 2^{1202113423421} is an apocalyptic number.

It is an amenable number.

1202113423421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202113423421 is an equidigital number, since it uses as much as digits as its factorization.

1202113423421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 1202113423421 its reverse (1243243112021), we get a palindrome (2445356535442).

The spelling of 1202113423421 in words is "one trillion, two hundred two billion, one hundred thirteen million, four hundred twenty-three thousand, four hundred twenty-one".