100121012212021 has 4 divisors (see below), whose sum is σ = 100121069541472. Its totient is φ = 100120954882572.

The previous prime is 100121012211931. The next prime is 100121012212037. The reversal of 100121012212021 is 120212210121001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100121012212021 - 2⁴¹ = 97921988956469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100121012211986 and 100121012212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121012212321) 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, 25960035 + ... + 29566288.

It is an arithmetic number, because the mean of its divisors is an integer number (25030267385368).

Almost surely, 2^{100121012212021} is an apocalyptic number.

It is an amenable number.

100121012212021 is a deficient number, since it is larger than the sum of its proper divisors (57329451).

100121012212021 is an equidigital number, since it uses as much as digits as its factorization.

100121012212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57329450.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 100121012212021 its reverse (120212210121001), we get a palindrome (220333222333022).

The spelling of 100121012212021 in words is "one hundred trillion, one hundred twenty-one billion, twelve million, two hundred twelve thousand, twenty-one".