1210132221520 has 40 divisors (see below), whose sum is σ = 2813694677640. Its totient is φ = 484029273600.

The previous prime is 1210132221511. The next prime is 1210132221527. The reversal of 1210132221520 is 251222310121.

It can be written as a sum of positive squares in 4 ways, for example, as 4405242384 + 1205726979136 = 66372^2 + 1098056^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1210132221520² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1210132221491 and 1210132221500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210132221527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1329646 + ... + 2046514.

It is an arithmetic number, because the mean of its divisors is an integer number (70342366941).

Almost surely, 2^{1210132221520} is an apocalyptic number.

1210132221520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210132221520 is an abundant number, since it is smaller than the sum of its proper divisors (1603562456120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1210132221520 is a wasteful number, since it uses less digits than its factorization.

1210132221520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737983 (or 737977 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 1210132221520 its reverse (251222310121), we get a palindrome (1461354531641).

The spelling of 1210132221520 in words is "one trillion, two hundred ten billion, one hundred thirty-two million, two hundred twenty-one thousand, five hundred twenty".