100220002121021 has 4 divisors (see below), whose sum is σ = 106115296363452. Its totient is φ = 94324707878592.

The previous prime is 100220002121011. The next prime is 100220002121027. The reversal of 100220002121021 is 120121200022001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71486264052025 + 28733738068996 = 8454955^2 + 5360386^2 .

It is a cyclic number.

It is not a de Polignac number, because 100220002121021 - 2³⁴ = 100202822251837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100220002120987 and 100220002121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100220002121027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2947647121190 + ... + 2947647121223.

It is an arithmetic number, because the mean of its divisors is an integer number (26528824090863).

Almost surely, 2^{100220002121021} is an apocalyptic number.

It is an amenable number.

100220002121021 is a deficient number, since it is larger than the sum of its proper divisors (5895294242431).

100220002121021 is an equidigital number, since it uses as much as digits as its factorization.

100220002121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5895294242430.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 100220002121021 its reverse (120121200022001), we get a palindrome (220341202143022).

The spelling of 100220002121021 in words is "one hundred trillion, two hundred twenty billion, two million, one hundred twenty-one thousand, twenty-one".