101421021204 has 72 divisors (see below), whose sum is σ = 265573886760. Its totient is φ = 32611814400.

The previous prime is 101421021203. The next prime is 101421021241. The reversal of 101421021204 is 402120124101.

It can be written as a sum of positive squares in 4 ways, for example, as 3578432400 + 97842588804 = 59820^2 + 312798^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101421021203) 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 23 ways as a sum of consecutive naturals, for example, 254667 + ... + 517394.

It is an arithmetic number, because the mean of its divisors is an integer number (3688526205).

Almost surely, 2^101421021204 is an apocalyptic number.

It is an amenable number.

101421021204 is an abundant number, since it is smaller than the sum of its proper divisors (164152865556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101421021204 is a wasteful number, since it uses less digits than its factorization.

101421021204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772201 (or 772196 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 101421021204 its reverse (402120124101), we get a palindrome (503541145305).

The spelling of 101421021204 in words is "one hundred one billion, four hundred twenty-one million, twenty-one thousand, two hundred four".