1211201010 has 48 divisors (see below), whose sum is σ = 3158227800. Its totient is φ = 322053120.

The previous prime is 1211200993. The next prime is 1211201011. The reversal of 1211201010 is 101021121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 949440969 + 261760041 = 30813^2 + 16179^2 .

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 = 1211200983 and 1211201001.

It is not an unprimeable number, because it can be changed into a prime (1211201011) 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, 12130 + ... + 50690.

Almost surely, 2^1211201010 is an apocalyptic number.

1211201010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211201010 is an abundant number, since it is smaller than the sum of its proper divisors (1947026790).

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

1211201010 is a wasteful number, since it uses less digits than its factorization.

1211201010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38923 (or 38920 counting only the distinct ones).

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

The square root of 1211201010 is about 34802.3132851826. The cubic root of 1211201010 is about 1065.9546818756.

Adding to 1211201010 its reverse (101021121), we get a palindrome (1312222131).

The spelling of 1211201010 in words is "one billion, two hundred eleven million, two hundred one thousand, ten".