111002100202421 has 2 divisors, whose sum is σ = 111002100202422. Its totient is φ = 111002100202420.

The previous prime is 111002100202417. The next prime is 111002100202453. The reversal of 111002100202421 is 124202001200111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110715324958225 + 286775244196 = 10522135^2 + 535514^2 .

It is a cyclic number.

It is not a de Polignac number, because 111002100202421 - 2² = 111002100202417 is a prime.

It is a super-2 number, since 2×111002100202421² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111002100202421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111002100202481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55501050101210 + 55501050101211.

It is an arithmetic number, because the mean of its divisors is an integer number (55501050101211).

Almost surely, 2^{111002100202421} is an apocalyptic number.

It is an amenable number.

111002100202421 is a deficient number, since it is larger than the sum of its proper divisors (1).

111002100202421 is an equidigital number, since it uses as much as digits as its factorization.

111002100202421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111002100202421 its reverse (124202001200111), we get a palindrome (235204101402532).

The spelling of 111002100202421 in words is "one hundred eleven trillion, two billion, one hundred million, two hundred two thousand, four hundred twenty-one".