1210211121010 has 8 divisors (see below), whose sum is σ = 2178380017836. Its totient is φ = 484084448400.

The previous prime is 1210211120971. The next prime is 1210211121013. The reversal of 1210211121010 is 101211120121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1027585662601 + 182625458409 = 1013699^2 + 427347^2 .

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

It is a super-2 number, since 2×1210211121010² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1210211121013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60510556041 + ... + 60510556060.

Almost surely, 2^{1210211121010} is an apocalyptic number.

1210211121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1210211121010 is a deficient number, since it is larger than the sum of its proper divisors (968168896826).

1210211121010 is a wasteful number, since it uses less digits than its factorization.

1210211121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121021112108.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1210211121010 its reverse (101211120121), we get a palindrome (1311422241131).

The spelling of 1210211121010 in words is "one trillion, two hundred ten billion, two hundred eleven million, one hundred twenty-one thousand, ten".