100121988437 has 2 divisors, whose sum is σ = 100121988438. Its totient is φ = 100121988436.

The previous prime is 100121988433. The next prime is 100121988457. The reversal of 100121988437 is 734889121001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82875470161 + 17246518276 = 287881^2 + 131326^2 .

It is a cyclic number.

It is not a de Polignac number, because 100121988437 - 2² = 100121988433 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100121988433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060994218 + 50060994219.

It is an arithmetic number, because the mean of its divisors is an integer number (50060994219).

Almost surely, 2^100121988437 is an apocalyptic number.

It is an amenable number.

100121988437 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121988437 is an equidigital number, since it uses as much as digits as its factorization.

100121988437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 44.

The spelling of 100121988437 in words is "one hundred billion, one hundred twenty-one million, nine hundred eighty-eight thousand, four hundred thirty-seven".