1212001001210 has 16 divisors (see below), whose sum is σ = 2181985381800. Its totient is φ = 484715160576.

The previous prime is 1212001001203. The next prime is 1212001001257. The reversal of 1212001001210 is 121001002121.

It can be written as a sum of positive squares in 4 ways, for example, as 899422727641 + 312578273569 = 948379^2 + 559087^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1212001001191 and 1212001001200.

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, 10595255 + ... + 10709034.

Almost surely, 2^{1212001001210} is an apocalyptic number.

1212001001210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212001001210 is a deficient number, since it is larger than the sum of its proper divisors (969984380590).

1212001001210 is a wasteful number, since it uses less digits than its factorization.

1212001001210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21309985.

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

Adding to 1212001001210 its reverse (121001002121), we get a palindrome (1333002003331).

The spelling of 1212001001210 in words is "one trillion, two hundred twelve billion, one million, one thousand, two hundred ten".