1221110000210 has 16 divisors (see below), whose sum is σ = 2198030852376. Its totient is φ = 488436699648.

The previous prime is 1221110000171. The next prime is 1221110000249. The reversal of 1221110000210 is 120000111221.

It is an interprime number because it is at equal distance from previous prime (1221110000171) and next prime (1221110000249).

It can be written as a sum of positive squares in 4 ways, for example, as 819827026249 + 401282973961 = 905443^2 + 633469^2 .

It is a super-2 number, since 2×1221110000210² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221110000191 and 1221110000200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182207 + ... + 1573346.

Almost surely, 2^{1221110000210} is an apocalyptic number.

1221110000210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221110000210 is a deficient number, since it is larger than the sum of its proper divisors (976920852166).

1221110000210 is a wasteful number, since it uses less digits than its factorization.

1221110000210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825117.

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

Adding to 1221110000210 its reverse (120000111221), we get a palindrome (1341110111431).

The spelling of 1221110000210 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, two hundred ten", and thus it is an aban number.