1201120021010 has 48 divisors (see below), whose sum is σ = 2708459666136. Its totient is φ = 380134685952.

The previous prime is 1201120021001. The next prime is 1201120021019. The reversal of 1201120021010 is 101200211021.

It is an interprime number because it is at equal distance from previous prime (1201120021001) and next prime (1201120021019).

It can be written as a sum of positive squares in 4 ways, for example, as 1095001094929 + 106118926081 = 1046423^2 + 325759^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1201120020982 and 1201120021000.

It is not an unprimeable number, because it can be changed into a prime (1201120021019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94273067 + ... + 94285806.

Almost surely, 2^{1201120021010} is an apocalyptic number.

1201120021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201120021010 is an abundant number, since it is smaller than the sum of its proper divisors (1507339645126).

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

1201120021010 is a wasteful number, since it uses less digits than its factorization.

1201120021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188558907 (or 188558900 counting only the distinct ones).

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

Adding to 1201120021010 its reverse (101200211021), we get a palindrome (1302320232031).

The spelling of 1201120021010 in words is "one trillion, two hundred one billion, one hundred twenty million, twenty-one thousand, ten".