20021211110 has 32 divisors (see below), whose sum is σ = 37549159200. Its totient is φ = 7676686080.

The previous prime is 20021211109. The next prime is 20021211131. The reversal of 20021211110 is 1111212002.

It is a super-2 number, since 2×20021211110² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20021211091 and 20021211100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208031 + ... + 288650.

It is an arithmetic number, because the mean of its divisors is an integer number (1173411225).

Almost surely, 2^20021211110 is an apocalyptic number.

20021211110 is a deficient number, since it is larger than the sum of its proper divisors (17527948090).

20021211110 is a wasteful number, since it uses less digits than its factorization.

20021211110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496856.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20021211110 its reverse (1111212002), we get a palindrome (21132423112).

The spelling of 20021211110 in words is "twenty billion, twenty-one million, two hundred eleven thousand, one hundred ten".