210122026642 has 16 divisors (see below), whose sum is σ = 344143904832. Its totient is φ = 95424495120.

The previous prime is 210122026577. The next prime is 210122026649. The reversal of 210122026642 is 246620221012.

It is a self number, because there is not a number n which added to its sum of digits gives 210122026642.

It is not an unprimeable number, because it can be changed into a prime (210122026649) 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, 4250718 + ... + 4299865.

It is an arithmetic number, because the mean of its divisors is an integer number (21508994052).

Almost surely, 2^210122026642 is an apocalyptic number.

210122026642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

210122026642 is a deficient number, since it is larger than the sum of its proper divisors (134021878190).

210122026642 is a wasteful number, since it uses less digits than its factorization.

210122026642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8551713.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 210122026642 its reverse (246620221012), we get a palindrome (456742247654).

The spelling of 210122026642 in words is "two hundred ten billion, one hundred twenty-two million, twenty-six thousand, six hundred forty-two".