101030421554 has 4 divisors (see below), whose sum is σ = 151545632334. Its totient is φ = 50515210776.

The previous prime is 101030421553. The next prime is 101030421581. The reversal of 101030421554 is 455124030101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 455124030101 = 13 ⋅35009540777.

It can be written as a sum of positive squares in only one way, i.e., 100186809529 + 843612025 = 316523^2 + 29045^2 .

It is not an unprimeable number, because it can be changed into a prime (101030421553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25257605387 + ... + 25257605390.

Almost surely, 2^101030421554 is an apocalyptic number.

101030421554 is a deficient number, since it is larger than the sum of its proper divisors (50515210780).

101030421554 is an equidigital number, since it uses as much as digits as its factorization.

101030421554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50515210779.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 101030421554 its reverse (455124030101), we get a palindrome (556154451655).

The spelling of 101030421554 in words is "one hundred one billion, thirty million, four hundred twenty-one thousand, five hundred fifty-four".