101603436021 has 8 divisors (see below), whose sum is σ = 150523608960. Its totient is φ = 67735623996.

The previous prime is 101603436001. The next prime is 101603436029. The reversal of 101603436021 is 120634306101.

101603436021 is a `hidden beast` number, since 1 + 0 + 1 + 603 + 4 + 36 + 0 + 21 = 666.

It is not a de Polignac number, because 101603436021 - 2⁶ = 101603435957 is a prime.

It is a super-2 number, since 2×101603436021² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3763090223 = 101603436021 / (1 + 0 + 1 + 6 + 0 + 3 + 4 + 3 + 6 + 0 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101603436029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1881545085 + ... + 1881545138.

It is an arithmetic number, because the mean of its divisors is an integer number (18815451120).

Almost surely, 2^101603436021 is an apocalyptic number.

It is an amenable number.

101603436021 is a deficient number, since it is larger than the sum of its proper divisors (48920172939).

101603436021 is an equidigital number, since it uses as much as digits as its factorization.

101603436021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3763090232 (or 3763090226 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The spelling of 101603436021 in words is "one hundred one billion, six hundred three million, four hundred thirty-six thousand, twenty-one".