10101421990 has 16 divisors (see below), whose sum is σ = 19835519760. Its totient is φ = 3673244320.

The previous prime is 10101421961. The next prime is 10101421997. The reversal of 10101421990 is 9912410101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101421997) 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 7 ways as a sum of consecutive naturals, for example, 45915445 + ... + 45915664.

It is an arithmetic number, because the mean of its divisors is an integer number (1239719985).

Almost surely, 2^10101421990 is an apocalyptic number.

10101421990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10101421990 is a deficient number, since it is larger than the sum of its proper divisors (9734097770).

10101421990 is a wasteful number, since it uses less digits than its factorization.

10101421990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91831127.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 10101421990 in words is "ten billion, one hundred one million, four hundred twenty-one thousand, nine hundred ninety".