1212120010 has 32 divisors (see below), whose sum is σ = 2396511360. Its totient is φ = 439357248.

The previous prime is 1212119999. The next prime is 1212120011. The reversal of 1212120010 is 100212121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1212120011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134317 + ... + 143056.

It is an arithmetic number, because the mean of its divisors is an integer number (74890980).

Almost surely, 2^1212120010 is an apocalyptic number.

1212120010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212120010 is a deficient number, since it is larger than the sum of its proper divisors (1184391350).

1212120010 is a wasteful number, since it uses less digits than its factorization.

1212120010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277422.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1212120010 is about 34815.5139269838. The cubic root of 1212120010 is about 1066.2242117852.

Adding to 1212120010 its reverse (100212121), we get a palindrome (1312332131).

It can be divided in two parts, 12121 and 20010, that added together give a triangular number (32131 = T₂₅₃).

The spelling of 1212120010 in words is "one billion, two hundred twelve million, one hundred twenty thousand, ten".