21121210001010 has 64 divisors (see below), whose sum is σ = 59165067313152. Its totient is φ = 4724988010176.

The previous prime is 21121210001009. The next prime is 21121210001069. The reversal of 21121210001010 is 1010001212112.

It is a super-2 number, since 2×21121210001010² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1069960242 + ... + 1069979981.

It is an arithmetic number, because the mean of its divisors is an integer number (924454176768).

Almost surely, 2^{21121210001010} is an apocalyptic number.

21121210001010 is an abundant number, since it is smaller than the sum of its proper divisors (38043857312142).

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

21121210001010 is a wasteful number, since it uses less digits than its factorization.

21121210001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139940287.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21121210001010 its reverse (1010001212112), we get a palindrome (22131211213122).

The spelling of 21121210001010 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred ten million, one thousand, ten".