1212011232210 has 192 divisors, whose sum is σ = 3275950021344. Its totient is φ = 310639104000.

The previous prime is 1212011232203. The next prime is 1212011232233. The reversal of 1212011232210 is 122321102121.

1212011232210 is a `hidden beast` number, since 1 + 21 + 201 + 1 + 232 + 210 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 168297678081 + 1043713554129 = 410241^2 + 1021623^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 155044222 + ... + 155052038.

Almost surely, 2^{1212011232210} is an apocalyptic number.

1212011232210 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 1212011232210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1637975010672).

1212011232210 is an abundant number, since it is smaller than the sum of its proper divisors (2063938789134).

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

1212011232210 is a wasteful number, since it uses less digits than its factorization.

1212011232210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8429 (or 8426 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1212011232210 its reverse (122321102121), we get a palindrome (1334332334331).

The spelling of 1212011232210 in words is "one trillion, two hundred twelve billion, eleven million, two hundred thirty-two thousand, two hundred ten".