1221212010010 has 8 divisors (see below), whose sum is σ = 2198181618036. Its totient is φ = 488484804000.

The previous prime is 1221212010001. The next prime is 1221212010059. The reversal of 1221212010010 is 100102121221.

It can be written as a sum of positive squares in 2 ways, for example, as 1050483554761 + 170728455249 = 1024931^2 + 413193^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61060600491 + ... + 61060600510.

Almost surely, 2^{1221212010010} is an apocalyptic number.

1221212010010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221212010010 is a deficient number, since it is larger than the sum of its proper divisors (976969608026).

1221212010010 is a wasteful number, since it uses less digits than its factorization.

1221212010010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122121201008.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1221212010010 its reverse (100102121221), we get a palindrome (1321314131231).

The spelling of 1221212010010 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, ten thousand, ten".