20102021121210 has 64 divisors (see below), whose sum is σ = 55557865211904. Its totient is φ = 4559673268800.

The previous prime is 20102021121197. The next prime is 20102021121251. The reversal of 20102021121210 is 1212112020102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20102021121210.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 365330926 + ... + 365385945.

It is an arithmetic number, because the mean of its divisors is an integer number (868091643936).

Almost surely, 2^{20102021121210} is an apocalyptic number.

20102021121210 is an abundant number, since it is smaller than the sum of its proper divisors (35455844090694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20102021121210 is a wasteful number, since it uses less digits than its factorization.

20102021121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730717019.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20102021121210 its reverse (1212112020102), we get a palindrome (21314133141312).

The spelling of 20102021121210 in words is "twenty trillion, one hundred two billion, twenty-one million, one hundred twenty-one thousand, two hundred ten".