21121110220010 has 64 divisors (see below), whose sum is σ = 39699792824832. Its totient is φ = 8084848551936.

The previous prime is 21121110220003. The next prime is 21121110220027. The reversal of 21121110220010 is 1002201112112.

It is a super-2 number, since 2×21121110220010² (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, 993104 + ... + 6574836.

It is an arithmetic number, because the mean of its divisors is an integer number (620309262888).

Almost surely, 2^{21121110220010} is an apocalyptic number.

21121110220010 is a deficient number, since it is larger than the sum of its proper divisors (18578682604822).

21121110220010 is a wasteful number, since it uses less digits than its factorization.

21121110220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5581967.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21121110220010 its reverse (1002201112112), we get a palindrome (22123311332122).

The spelling of 21121110220010 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, two hundred twenty thousand, ten".