100121220022021 has 8 divisors (see below), whose sum is σ = 111283963249824. Its totient is φ = 89301945816720.

The previous prime is 100121220022007. The next prime is 100121220022069. The reversal of 100121220022021 is 120220022121001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100121220022021 - 2²¹ = 100121217924869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100121220021986 and 100121220022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121220022321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85867255011 + ... + 85867256176.

It is an arithmetic number, because the mean of its divisors is an integer number (13910495406228).

Almost surely, 2^{100121220022021} is an apocalyptic number.

100121220022021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100121220022021 is a deficient number, since it is larger than the sum of its proper divisors (11162743227803).

100121220022021 is a wasteful number, since it uses less digits than its factorization.

100121220022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171734511251.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 100121220022021 its reverse (120220022121001), we get a palindrome (220341242143022).

It can be divided in two parts, 100 and 121220022021, that added together give a palindrome (121220022121).

The spelling of 100121220022021 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twenty million, twenty-two thousand, twenty-one".