100122220021990 has 16 divisors (see below), whose sum is σ = 184615605699840. Its totient is φ = 39072085862080.

The previous prime is 100122220021933. The next prime is 100122220021991. The reversal of 100122220021990 is 99120022221001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100122220021991) 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, 122100267910 + ... + 122100268729.

It is an arithmetic number, because the mean of its divisors is an integer number (11538475356240).

Almost surely, 2^{100122220021990} is an apocalyptic number.

100122220021990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100122220021990 is a deficient number, since it is larger than the sum of its proper divisors (84493385677850).

100122220021990 is a wasteful number, since it uses less digits than its factorization.

100122220021990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244200536687.

The product of its (nonzero) digits is 2592, while the sum is 31.

Adding to 100122220021990 its reverse (99120022221001), we get a palindrome (199242242242991).

The spelling of 100122220021990 in words is "one hundred trillion, one hundred twenty-two billion, two hundred twenty million, twenty-one thousand, nine hundred ninety".