1201011210 has 144 divisors (see below), whose sum is σ = 3650489856. Its totient is φ = 268364736.

The previous prime is 1201011181. The next prime is 1201011233. The reversal of 1201011210 is 121101021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1201011192 and 1201011201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1391239 + ... + 1392101.

It is an arithmetic number, because the mean of its divisors is an integer number (25350624).

Almost surely, 2^1201011210 is an apocalyptic number.

1201011210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201011210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1825244928).

1201011210 is an abundant number, since it is smaller than the sum of its proper divisors (2449478646).

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

1201011210 is a wasteful number, since it uses less digits than its factorization.

1201011210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977 (or 927 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1201011210 is about 34655.6086369869. The cubic root of 1201011210 is about 1062.9569773145.

Adding to 1201011210 its reverse (121101021), we get a palindrome (1322112231).

It can be divided in two parts, 12010 and 11210, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 1201011210 in words is "one billion, two hundred one million, eleven thousand, two hundred ten".